diff --git a/src/bloom.cpp b/src/bloom.cpp
index fd328e8e9..2677652ad 100644
--- a/src/bloom.cpp
+++ b/src/bloom.cpp
@@ -280,8 +280,8 @@ void CRollingBloomFilter::insert(const std::vector<unsigned char>& vKey)
 
 void CRollingBloomFilter::insert(const uint256& hash)
 {
-    vector<unsigned char> data(hash.begin(), hash.end());
-    insert(data);
+    vector<unsigned char> vData(hash.begin(), hash.end());
+    insert(vData);
 }
 
 bool CRollingBloomFilter::contains(const std::vector<unsigned char>& vKey) const
@@ -300,8 +300,8 @@ bool CRollingBloomFilter::contains(const std::vector<unsigned char>& vKey) const
 
 bool CRollingBloomFilter::contains(const uint256& hash) const
 {
-    vector<unsigned char> data(hash.begin(), hash.end());
-    return contains(data);
+    vector<unsigned char> vData(hash.begin(), hash.end());
+    return contains(vData);
 }
 
 void CRollingBloomFilter::reset()
diff --git a/src/key.cpp b/src/key.cpp
index 79023566c..aae9b042a 100644
--- a/src/key.cpp
+++ b/src/key.cpp
@@ -243,12 +243,12 @@ bool CKey::Derive(CKey& keyChild, ChainCode &ccChild, unsigned int nChild, const
     return ret;
 }
 
-bool CExtKey::Derive(CExtKey &out, unsigned int nChild) const {
+bool CExtKey::Derive(CExtKey &out, unsigned int _nChild) const {
     out.nDepth = nDepth + 1;
     CKeyID id = key.GetPubKey().GetID();
     memcpy(&out.vchFingerprint[0], &id, 4);
-    out.nChild = nChild;
-    return key.Derive(out.key, out.chaincode, nChild, chaincode);
+    out.nChild = _nChild;
+    return key.Derive(out.key, out.chaincode, _nChild, chaincode);
 }
 
 void CExtKey::SetMaster(const unsigned char *seed, unsigned int nSeedLen) {
diff --git a/src/main.cpp b/src/main.cpp
index 60bda426a..c33b41ac4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1185,9 +1185,9 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState& state, const C
                 bool fReplacementOptOut = true;
                 if (fEnableReplacement)
                 {
-                    BOOST_FOREACH(const CTxIn &txin, ptxConflicting->vin)
+                    BOOST_FOREACH(const CTxIn &_txin, ptxConflicting->vin)
                     {
-                        if (txin.nSequence < std::numeric_limits<unsigned int>::max()-1)
+                        if (_txin.nSequence < std::numeric_limits<unsigned int>::max()-1)
                         {
                             fReplacementOptOut = false;
                             break;
@@ -2499,14 +2499,14 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
     if (pindex->GetUndoPos().IsNull() || !pindex->IsValid(BLOCK_VALID_SCRIPTS))
     {
         if (pindex->GetUndoPos().IsNull()) {
-            CDiskBlockPos pos;
-            if (!FindUndoPos(state, pindex->nFile, pos, ::GetSerializeSize(blockundo, SER_DISK, CLIENT_VERSION) + 40))
+            CDiskBlockPos _pos;
+            if (!FindUndoPos(state, pindex->nFile, _pos, ::GetSerializeSize(blockundo, SER_DISK, CLIENT_VERSION) + 40))
                 return error("ConnectBlock(): FindUndoPos failed");
-            if (!UndoWriteToDisk(blockundo, pos, pindex->pprev->GetBlockHash(), chainparams.MessageStart()))
+            if (!UndoWriteToDisk(blockundo, _pos, pindex->pprev->GetBlockHash(), chainparams.MessageStart()))
                 return AbortNode(state, "Failed to write undo data");
 
             // update nUndoPos in block index
-            pindex->nUndoPos = pos.nPos;
+            pindex->nUndoPos = _pos.nPos;
             pindex->nStatus |= BLOCK_HAVE_UNDO;
         }
 
@@ -3819,10 +3819,10 @@ void PruneOneBlockFile(const int fileNumber)
             // mapBlocksUnlinked or setBlockIndexCandidates.
             std::pair<std::multimap<CBlockIndex*, CBlockIndex*>::iterator, std::multimap<CBlockIndex*, CBlockIndex*>::iterator> range = mapBlocksUnlinked.equal_range(pindex->pprev);
             while (range.first != range.second) {
-                std::multimap<CBlockIndex *, CBlockIndex *>::iterator it = range.first;
+                std::multimap<CBlockIndex *, CBlockIndex *>::iterator _it = range.first;
                 range.first++;
-                if (it->second == pindex) {
-                    mapBlocksUnlinked.erase(it);
+                if (_it->second == pindex) {
+                    mapBlocksUnlinked.erase(_it);
                 }
             }
         }
@@ -5550,9 +5550,9 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
             }
             if (!fRejectedParents) {
                 BOOST_FOREACH(const CTxIn& txin, tx.vin) {
-                    CInv inv(MSG_TX, txin.prevout.hash);
-                    pfrom->AddInventoryKnown(inv);
-                    if (!AlreadyHave(inv)) pfrom->AskFor(inv);
+                    CInv _inv(MSG_TX, txin.prevout.hash);
+                    pfrom->AddInventoryKnown(_inv);
+                    if (!AlreadyHave(_inv)) pfrom->AskFor(_inv);
                 }
                 AddOrphanTx(tx, pfrom->GetId());
 
@@ -6317,9 +6317,9 @@ class CompareInvMempoolOrder
 {
     CTxMemPool *mp;
 public:
-    CompareInvMempoolOrder(CTxMemPool *mempool)
+    CompareInvMempoolOrder(CTxMemPool *_mempool)
     {
-        mp = mempool;
+        mp = _mempool;
     }
 
     bool operator()(std::set<uint256>::iterator a, std::set<uint256>::iterator b)
diff --git a/src/pubkey.cpp b/src/pubkey.cpp
index be4ee27cd..91a657593 100644
--- a/src/pubkey.cpp
+++ b/src/pubkey.cpp
@@ -264,12 +264,12 @@ void CExtPubKey::Decode(const unsigned char code[BIP32_EXTKEY_SIZE]) {
     pubkey.Set(code+41, code+BIP32_EXTKEY_SIZE);
 }
 
-bool CExtPubKey::Derive(CExtPubKey &out, unsigned int nChild) const {
+bool CExtPubKey::Derive(CExtPubKey &out, unsigned int _nChild) const {
     out.nDepth = nDepth + 1;
     CKeyID id = pubkey.GetID();
     memcpy(&out.vchFingerprint[0], &id, 4);
-    out.nChild = nChild;
-    return pubkey.Derive(out.pubkey, out.chaincode, nChild, chaincode);
+    out.nChild = _nChild;
+    return pubkey.Derive(out.pubkey, out.chaincode, _nChild, chaincode);
 }
 
 /* static */ bool CPubKey::CheckLowS(const std::vector<unsigned char>& vchSig) {
diff --git a/src/pubkey.h b/src/pubkey.h
index aebfdbc82..3a554877f 100644
--- a/src/pubkey.h
+++ b/src/pubkey.h
@@ -88,9 +88,9 @@ public:
     }
 
     //! Construct a public key from a byte vector.
-    CPubKey(const std::vector<unsigned char>& vch)
+    CPubKey(const std::vector<unsigned char>& _vch)
     {
-        Set(vch.begin(), vch.end());
+        Set(_vch.begin(), _vch.end());
     }
 
     //! Simple read-only vector-like interface to the pubkey data.
diff --git a/src/reverselock.h b/src/reverselock.h
index fac1ccb79..1fd8de5d8 100644
--- a/src/reverselock.h
+++ b/src/reverselock.h
@@ -13,9 +13,9 @@ class reverse_lock
 {
 public:
 
-    explicit reverse_lock(Lock& lock) : lock(lock) {
-        lock.unlock();
-        lock.swap(templock);
+    explicit reverse_lock(Lock& _lock) : lock(_lock) {
+        _lock.unlock();
+        _lock.swap(templock);
     }
 
     ~reverse_lock() {
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index f05f8ff35..91d3197cd 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -497,10 +497,10 @@ UniValue getmempoolancestors(const UniValue& params, bool fHelp)
         UniValue o(UniValue::VOBJ);
         BOOST_FOREACH(CTxMemPool::txiter ancestorIt, setAncestors) {
             const CTxMemPoolEntry &e = *ancestorIt;
-            const uint256& hash = e.GetTx().GetHash();
+            const uint256& _hash = e.GetTx().GetHash();
             UniValue info(UniValue::VOBJ);
             entryToJSON(info, e);
-            o.push_back(Pair(hash.ToString(), info));
+            o.push_back(Pair(_hash.ToString(), info));
         }
         return o;
     }
@@ -561,10 +561,10 @@ UniValue getmempooldescendants(const UniValue& params, bool fHelp)
         UniValue o(UniValue::VOBJ);
         BOOST_FOREACH(CTxMemPool::txiter descendantIt, setDescendants) {
             const CTxMemPoolEntry &e = *descendantIt;
-            const uint256& hash = e.GetTx().GetHash();
+            const uint256& _hash = e.GetTx().GetHash();
             UniValue info(UniValue::VOBJ);
             entryToJSON(info, e);
-            o.push_back(Pair(hash.ToString(), info));
+            o.push_back(Pair(_hash.ToString(), info));
         }
         return o;
     }
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index 7794ac619..6b13aa5ba 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -607,8 +607,8 @@ UniValue getblocktemplate(const UniValue& params, bool fHelp)
 
     UniValue aRules(UniValue::VARR);
     UniValue vbavailable(UniValue::VOBJ);
-    for (int i = 0; i < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; ++i) {
-        Consensus::DeploymentPos pos = Consensus::DeploymentPos(i);
+    for (int j = 0; j < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; ++j) {
+        Consensus::DeploymentPos pos = Consensus::DeploymentPos(j);
         ThresholdState state = VersionBitsState(pindexPrev, consensusParams, pos, versionbitscache);
         switch (state) {
             case THRESHOLD_DEFINED:
diff --git a/src/support/pagelocker.h b/src/support/pagelocker.h
index 6b3979e55..538bf3945 100644
--- a/src/support/pagelocker.h
+++ b/src/support/pagelocker.h
@@ -28,11 +28,11 @@ template <class Locker>
 class LockedPageManagerBase
 {
 public:
-    LockedPageManagerBase(size_t page_size) : page_size(page_size)
+    LockedPageManagerBase(size_t _page_size) : page_size(_page_size)
     {
         // Determine bitmask for extracting page from address
-        assert(!(page_size & (page_size - 1))); // size must be power of two
-        page_mask = ~(page_size - 1);
+        assert(!(_page_size & (_page_size - 1))); // size must be power of two
+        page_mask = ~(_page_size - 1);
     }
 
     ~LockedPageManagerBase()
diff --git a/src/test/crypto_tests.cpp b/src/test/crypto_tests.cpp
index 58a62ee02..ff0adae1d 100644
--- a/src/test/crypto_tests.cpp
+++ b/src/test/crypto_tests.cpp
@@ -133,13 +133,13 @@ void TestAES128CBC(const std::string &hexkey, const std::string &hexiv, bool pad
     {
         std::vector<unsigned char> sub(i, in.end());
         std::vector<unsigned char> subout(sub.size() + AES_BLOCKSIZE);
-        int size = enc.Encrypt(&sub[0], sub.size(), &subout[0]);
-        if (size != 0)
+        int _size = enc.Encrypt(&sub[0], sub.size(), &subout[0]);
+        if (_size != 0)
         {
-            subout.resize(size);
+            subout.resize(_size);
             std::vector<unsigned char> subdecrypted(subout.size());
-            size = dec.Decrypt(&subout[0], subout.size(), &subdecrypted[0]);
-            subdecrypted.resize(size);
+            _size = dec.Decrypt(&subout[0], subout.size(), &subdecrypted[0]);
+            subdecrypted.resize(_size);
             BOOST_CHECK(decrypted.size() == in.size());
             BOOST_CHECK_MESSAGE(subdecrypted == sub, HexStr(subdecrypted) + std::string(" != ") + HexStr(sub));
         }
@@ -174,13 +174,13 @@ void TestAES256CBC(const std::string &hexkey, const std::string &hexiv, bool pad
     {
         std::vector<unsigned char> sub(i, in.end());
         std::vector<unsigned char> subout(sub.size() + AES_BLOCKSIZE);
-        int size = enc.Encrypt(&sub[0], sub.size(), &subout[0]);
-        if (size != 0)
+        int _size = enc.Encrypt(&sub[0], sub.size(), &subout[0]);
+        if (_size != 0)
         {
-            subout.resize(size);
+            subout.resize(_size);
             std::vector<unsigned char> subdecrypted(subout.size());
-            size = dec.Decrypt(&subout[0], subout.size(), &subdecrypted[0]);
-            subdecrypted.resize(size);
+            _size = dec.Decrypt(&subout[0], subout.size(), &subdecrypted[0]);
+            subdecrypted.resize(_size);
             BOOST_CHECK(decrypted.size() == in.size());
             BOOST_CHECK_MESSAGE(subdecrypted == sub, HexStr(subdecrypted) + std::string(" != ") + HexStr(sub));
         }
diff --git a/src/test/net_tests.cpp b/src/test/net_tests.cpp
index 680708533..4a7d6e778 100644
--- a/src/test/net_tests.cpp
+++ b/src/test/net_tests.cpp
@@ -62,11 +62,11 @@ public:
     }
 };
 
-CDataStream AddrmanToStream(CAddrManSerializationMock& addrman)
+CDataStream AddrmanToStream(CAddrManSerializationMock& _addrman)
 {
     CDataStream ssPeersIn(SER_DISK, CLIENT_VERSION);
     ssPeersIn << FLATDATA(Params().MessageStart());
-    ssPeersIn << addrman;
+    ssPeersIn << _addrman;
     std::string str = ssPeersIn.str();
     vector<unsigned char> vchData(str.begin(), str.end());
     return CDataStream(vchData, SER_DISK, CLIENT_VERSION);
diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp
index 5a9aaf9bc..dad82baed 100644
--- a/src/test/script_tests.cpp
+++ b/src/test/script_tests.cpp
@@ -323,10 +323,10 @@ public:
         return *this;
     }
 
-    TestBuilder& Add(const CScript& script)
+    TestBuilder& Add(const CScript& _script)
     {
         DoPush();
-        spendTx.vin[0].scriptSig += script;
+        spendTx.vin[0].scriptSig += _script;
         return *this;
     }
 
@@ -343,8 +343,8 @@ public:
         return *this;
     }
 
-    TestBuilder& Push(const CScript& script) {
-         DoPush(std::vector<unsigned char>(script.begin(), script.end()));
+    TestBuilder& Push(const CScript& _script) {
+         DoPush(std::vector<unsigned char>(_script.begin(), _script.end()));
         return *this;
     }
 
diff --git a/src/torcontrol.cpp b/src/torcontrol.cpp
index 99c45d489..1ca6b4656 100644
--- a/src/torcontrol.cpp
+++ b/src/torcontrol.cpp
@@ -122,8 +122,8 @@ private:
     static void eventcb(struct bufferevent *bev, short what, void *ctx);
 };
 
-TorControlConnection::TorControlConnection(struct event_base *base):
-    base(base), b_conn(0)
+TorControlConnection::TorControlConnection(struct event_base *_base):
+    base(_base), b_conn(0)
 {
 }
 
@@ -194,7 +194,7 @@ void TorControlConnection::eventcb(struct bufferevent *bev, short what, void *ct
     }
 }
 
-bool TorControlConnection::Connect(const std::string &target, const ConnectionCB& connected, const ConnectionCB& disconnected)
+bool TorControlConnection::Connect(const std::string &target, const ConnectionCB& _connected, const ConnectionCB&  _disconnected)
 {
     if (b_conn)
         Disconnect();
@@ -213,8 +213,8 @@ bool TorControlConnection::Connect(const std::string &target, const ConnectionCB
         return false;
     bufferevent_setcb(b_conn, TorControlConnection::readcb, NULL, TorControlConnection::eventcb, this);
     bufferevent_enable(b_conn, EV_READ|EV_WRITE);
-    this->connected = connected;
-    this->disconnected = disconnected;
+    this->connected = _connected;
+    this->disconnected = _disconnected;
 
     // Finally, connect to target
     if (bufferevent_socket_connect(b_conn, (struct sockaddr*)&connect_to_addr, connect_to_addrlen) < 0) {
@@ -394,18 +394,18 @@ private:
     static void reconnect_cb(evutil_socket_t fd, short what, void *arg);
 };
 
-TorController::TorController(struct event_base* baseIn, const std::string& target):
-    base(baseIn),
-    target(target), conn(base), reconnect(true), reconnect_ev(0),
+TorController::TorController(struct event_base* _base, const std::string& _target):
+    base(_base),
+    target(_target), conn(base), reconnect(true), reconnect_ev(0),
     reconnect_timeout(RECONNECT_TIMEOUT_START)
 {
     reconnect_ev = event_new(base, -1, 0, reconnect_cb, this);
     if (!reconnect_ev)
         LogPrintf("tor: Failed to create event for reconnection: out of memory?\n");
     // Start connection attempts immediately
-    if (!conn.Connect(target, boost::bind(&TorController::connected_cb, this, _1),
+    if (!conn.Connect(_target, boost::bind(&TorController::connected_cb, this, _1),
          boost::bind(&TorController::disconnected_cb, this, _1) )) {
-        LogPrintf("tor: Initiating connection to Tor control port %s failed\n", target);
+        LogPrintf("tor: Initiating connection to Tor control port %s failed\n", _target);
     }
     // Read service private key if cached
     std::pair<bool,std::string> pkf = ReadBinaryFile(GetPrivateKeyFile());
@@ -426,7 +426,7 @@ TorController::~TorController()
     }
 }
 
-void TorController::add_onion_cb(TorControlConnection& conn, const TorControlReply& reply)
+void TorController::add_onion_cb(TorControlConnection& _conn, const TorControlReply& reply)
 {
     if (reply.code == 250) {
         LogPrint("tor", "tor: ADD_ONION successful\n");
@@ -454,7 +454,7 @@ void TorController::add_onion_cb(TorControlConnection& conn, const TorControlRep
     }
 }
 
-void TorController::auth_cb(TorControlConnection& conn, const TorControlReply& reply)
+void TorController::auth_cb(TorControlConnection& _conn, const TorControlReply& reply)
 {
     if (reply.code == 250) {
         LogPrint("tor", "tor: Authentication successful\n");
@@ -474,7 +474,7 @@ void TorController::auth_cb(TorControlConnection& conn, const TorControlReply& r
         // Request hidden service, redirect port.
         // Note that the 'virtual' port doesn't have to be the same as our internal port, but this is just a convenient
         // choice.  TODO; refactor the shutdown sequence some day.
-        conn.Command(strprintf("ADD_ONION %s Port=%i,127.0.0.1:%i", private_key, GetListenPort(), GetListenPort()),
+        _conn.Command(strprintf("ADD_ONION %s Port=%i,127.0.0.1:%i", private_key, GetListenPort(), GetListenPort()),
             boost::bind(&TorController::add_onion_cb, this, _1, _2));
     } else {
         LogPrintf("tor: Authentication failed\n");
@@ -508,7 +508,7 @@ static std::vector<uint8_t> ComputeResponse(const std::string &key, const std::v
     return computedHash;
 }
 
-void TorController::authchallenge_cb(TorControlConnection& conn, const TorControlReply& reply)
+void TorController::authchallenge_cb(TorControlConnection& _conn, const TorControlReply& reply)
 {
     if (reply.code == 250) {
         LogPrint("tor", "tor: SAFECOOKIE authentication challenge successful\n");
@@ -530,7 +530,7 @@ void TorController::authchallenge_cb(TorControlConnection& conn, const TorContro
             }
 
             std::vector<uint8_t> computedClientHash = ComputeResponse(TOR_SAFE_CLIENTKEY, cookie, clientNonce, serverNonce);
-            conn.Command("AUTHENTICATE " + HexStr(computedClientHash), boost::bind(&TorController::auth_cb, this, _1, _2));
+            _conn.Command("AUTHENTICATE " + HexStr(computedClientHash), boost::bind(&TorController::auth_cb, this, _1, _2));
         } else {
             LogPrintf("tor: Invalid reply to AUTHCHALLENGE\n");
         }
@@ -539,7 +539,7 @@ void TorController::authchallenge_cb(TorControlConnection& conn, const TorContro
     }
 }
 
-void TorController::protocolinfo_cb(TorControlConnection& conn, const TorControlReply& reply)
+void TorController::protocolinfo_cb(TorControlConnection& _conn, const TorControlReply& reply)
 {
     if (reply.code == 250) {
         std::set<std::string> methods;
@@ -579,23 +579,23 @@ void TorController::protocolinfo_cb(TorControlConnection& conn, const TorControl
             if (methods.count("HASHEDPASSWORD")) {
                 LogPrint("tor", "tor: Using HASHEDPASSWORD authentication\n");
                 boost::replace_all(torpassword, "\"", "\\\"");
-                conn.Command("AUTHENTICATE \"" + torpassword + "\"", boost::bind(&TorController::auth_cb, this, _1, _2));
+                _conn.Command("AUTHENTICATE \"" + torpassword + "\"", boost::bind(&TorController::auth_cb, this, _1, _2));
             } else {
                 LogPrintf("tor: Password provided with -torpassword, but HASHEDPASSWORD authentication is not available\n");
             }
         } else if (methods.count("NULL")) {
             LogPrint("tor", "tor: Using NULL authentication\n");
-            conn.Command("AUTHENTICATE", boost::bind(&TorController::auth_cb, this, _1, _2));
+            _conn.Command("AUTHENTICATE", boost::bind(&TorController::auth_cb, this, _1, _2));
         } else if (methods.count("SAFECOOKIE")) {
             // Cookie: hexdump -e '32/1 "%02x""\n"'  ~/.tor/control_auth_cookie
             LogPrint("tor", "tor: Using SAFECOOKIE authentication, reading cookie authentication from %s\n", cookiefile);
             std::pair<bool,std::string> status_cookie = ReadBinaryFile(cookiefile, TOR_COOKIE_SIZE);
             if (status_cookie.first && status_cookie.second.size() == TOR_COOKIE_SIZE) {
-                // conn.Command("AUTHENTICATE " + HexStr(status_cookie.second), boost::bind(&TorController::auth_cb, this, _1, _2));
+                // _conn.Command("AUTHENTICATE " + HexStr(status_cookie.second), boost::bind(&TorController::auth_cb, this, _1, _2));
                 cookie = std::vector<uint8_t>(status_cookie.second.begin(), status_cookie.second.end());
                 clientNonce = std::vector<uint8_t>(TOR_NONCE_SIZE, 0);
                 GetRandBytes(&clientNonce[0], TOR_NONCE_SIZE);
-                conn.Command("AUTHCHALLENGE SAFECOOKIE " + HexStr(clientNonce), boost::bind(&TorController::authchallenge_cb, this, _1, _2));
+                _conn.Command("AUTHCHALLENGE SAFECOOKIE " + HexStr(clientNonce), boost::bind(&TorController::authchallenge_cb, this, _1, _2));
             } else {
                 if (status_cookie.first) {
                     LogPrintf("tor: Authentication cookie %s is not exactly %i bytes, as is required by the spec\n", cookiefile, TOR_COOKIE_SIZE);
@@ -613,15 +613,15 @@ void TorController::protocolinfo_cb(TorControlConnection& conn, const TorControl
     }
 }
 
-void TorController::connected_cb(TorControlConnection& conn)
+void TorController::connected_cb(TorControlConnection& _conn)
 {
     reconnect_timeout = RECONNECT_TIMEOUT_START;
     // First send a PROTOCOLINFO command to figure out what authentication is expected
-    if (!conn.Command("PROTOCOLINFO 1", boost::bind(&TorController::protocolinfo_cb, this, _1, _2)))
+    if (!_conn.Command("PROTOCOLINFO 1", boost::bind(&TorController::protocolinfo_cb, this, _1, _2)))
         LogPrintf("tor: Error sending initial protocolinfo command\n");
 }
 
-void TorController::disconnected_cb(TorControlConnection& conn)
+void TorController::disconnected_cb(TorControlConnection& _conn)
 {
     // Stop advertising service when disconnected
     if (service.IsValid())
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index 0a00d757a..3586123d3 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -1116,8 +1116,8 @@ void CTxMemPool::TrimToSize(size_t sizelimit, std::vector<uint256>* pvNoSpendsRe
         std::vector<CTransaction> txn;
         if (pvNoSpendsRemaining) {
             txn.reserve(stage.size());
-            BOOST_FOREACH(txiter it, stage)
-                txn.push_back(it->GetTx());
+            BOOST_FOREACH(txiter iter, stage)
+                txn.push_back(iter->GetTx());
         }
         RemoveStaged(stage, false);
         if (pvNoSpendsRemaining) {
@@ -1125,8 +1125,8 @@ void CTxMemPool::TrimToSize(size_t sizelimit, std::vector<uint256>* pvNoSpendsRe
                 BOOST_FOREACH(const CTxIn& txin, tx.vin) {
                     if (exists(txin.prevout.hash))
                         continue;
-                    auto it = mapNextTx.lower_bound(COutPoint(txin.prevout.hash, 0));
-                    if (it == mapNextTx.end() || it->first->hash != txin.prevout.hash)
+                    auto iter = mapNextTx.lower_bound(COutPoint(txin.prevout.hash, 0));
+                    if (iter == mapNextTx.end() || iter->first->hash != txin.prevout.hash)
                         pvNoSpendsRemaining->push_back(txin.prevout.hash);
                 }
             }
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 50d63182a..85219c24c 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -401,8 +401,8 @@ set<uint256> CWallet::GetConflicts(const uint256& txid) const
         if (mapTxSpends.count(txin.prevout) <= 1)
             continue;  // No conflict if zero or one spends
         range = mapTxSpends.equal_range(txin.prevout);
-        for (TxSpends::const_iterator it = range.first; it != range.second; ++it)
-            result.insert(it->second);
+        for (TxSpends::const_iterator _it = range.first; _it != range.second; ++_it)
+            result.insert(_it->second);
     }
     return result;
 }
@@ -1281,9 +1281,9 @@ int CWalletTx::GetRequestCount() const
                 // How about the block it's in?
                 if (nRequests == 0 && !hashUnset())
                 {
-                    map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
-                    if (mi != pwallet->mapRequestCount.end())
-                        nRequests = (*mi).second;
+                    map<uint256, int>::const_iterator _mi = pwallet->mapRequestCount.find(hashBlock);
+                    if (_mi != pwallet->mapRequestCount.end())
+                        nRequests = (*_mi).second;
                     else
                         nRequests = 1; // If it's in someone else's block it must have got out
                 }
@@ -2938,17 +2938,17 @@ set< set<CTxDestination> > CWallet::GetAddressGroupings()
 
     set< set<CTxDestination>* > uniqueGroupings; // a set of pointers to groups of addresses
     map< CTxDestination, set<CTxDestination>* > setmap;  // map addresses to the unique group containing it
-    BOOST_FOREACH(set<CTxDestination> grouping, groupings)
+    BOOST_FOREACH(set<CTxDestination> _grouping, groupings)
     {
         // make a set of all the groups hit by this new group
         set< set<CTxDestination>* > hits;
         map< CTxDestination, set<CTxDestination>* >::iterator it;
-        BOOST_FOREACH(CTxDestination address, grouping)
+        BOOST_FOREACH(CTxDestination address, _grouping)
             if ((it = setmap.find(address)) != setmap.end())
                 hits.insert((*it).second);
 
         // merge all hit groups into a new single group and delete old groups
-        set<CTxDestination>* merged = new set<CTxDestination>(grouping);
+        set<CTxDestination>* merged = new set<CTxDestination>(_grouping);
         BOOST_FOREACH(set<CTxDestination>* hit, hits)
         {
             merged->insert(hit->begin(), hit->end());