diff --git a/src/addrman.h b/src/addrman.h
index e2b0cb10..5328a93b 100644
--- a/src/addrman.h
+++ b/src/addrman.h
@@ -420,7 +420,7 @@ public:
             Check();
         }
         if (fRet)
-            LogPrint("addrman", "Added %s from %s: %i tried, %i new\n", addr.ToStringIPPort().c_str(), source.ToString().c_str(), nTried, nNew);
+            LogPrint("addrman", "Added %s from %s: %i tried, %i new\n", addr.ToStringIPPort().c_str(), source.ToString(), nTried, nNew);
         return fRet;
     }
 
@@ -436,7 +436,7 @@ public:
             Check();
         }
         if (nAdd)
-            LogPrint("addrman", "Added %i addresses from %s: %i tried, %i new\n", nAdd, source.ToString().c_str(), nTried, nNew);
+            LogPrint("addrman", "Added %i addresses from %s: %i tried, %i new\n", nAdd, source.ToString(), nTried, nNew);
         return nAdd > 0;
     }
 
diff --git a/src/init.cpp b/src/init.cpp
index 76649887..bc4924b4 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -914,7 +914,7 @@ bool AppInit2(boost::thread_group& threadGroup)
         for (map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.begin(); mi != mapBlockIndex.end(); ++mi)
         {
             uint256 hash = (*mi).first;
-            if (strncmp(hash.ToString().c_str(), strMatch.c_str(), strMatch.size()) == 0)
+            if (boost::algorithm::starts_with(hash.ToString(), strMatch))
             {
                 CBlockIndex* pindex = (*mi).second;
                 CBlock block;
diff --git a/src/leveldbwrapper.h b/src/leveldbwrapper.h
index 53e9e439..043a56bf 100644
--- a/src/leveldbwrapper.h
+++ b/src/leveldbwrapper.h
@@ -93,7 +93,7 @@ public:
         if (!status.ok()) {
             if (status.IsNotFound())
                 return false;
-            LogPrintf("LevelDB read failure: %s\n", status.ToString().c_str());
+            LogPrintf("LevelDB read failure: %s\n", status.ToString());
             HandleError(status);
         }
         try {
@@ -122,7 +122,7 @@ public:
         if (!status.ok()) {
             if (status.IsNotFound())
                 return false;
-            LogPrintf("LevelDB read failure: %s\n", status.ToString().c_str());
+            LogPrintf("LevelDB read failure: %s\n", status.ToString());
             HandleError(status);
         }
         return true;
diff --git a/src/main.h b/src/main.h
index f47c9ee8..1dc48c0a 100644
--- a/src/main.h
+++ b/src/main.h
@@ -862,13 +862,13 @@ public:
     {
         return strprintf("CBlockIndex(pprev=%p, nHeight=%d, merkle=%s, hashBlock=%s)",
             pprev, nHeight,
-            hashMerkleRoot.ToString().c_str(),
-            GetBlockHash().ToString().c_str());
+            hashMerkleRoot.ToString(),
+            GetBlockHash().ToString());
     }
 
     void print() const
     {
-        LogPrintf("%s\n", ToString().c_str());
+        LogPrintf("%s\n", ToString());
     }
 
     // Check whether this block index entry is valid up to the passed validity level.
@@ -953,14 +953,14 @@ public:
         std::string str = "CDiskBlockIndex(";
         str += CBlockIndex::ToString();
         str += strprintf("\n                hashBlock=%s, hashPrev=%s)",
-            GetBlockHash().ToString().c_str(),
-            hashPrev.ToString().c_str());
+            GetBlockHash().ToString(),
+            hashPrev.ToString());
         return str;
     }
 
     void print() const
     {
-        LogPrintf("%s\n", ToString().c_str());
+        LogPrintf("%s\n", ToString());
     }
 };
 
diff --git a/src/net.h b/src/net.h
index 729b1bcd..58a8fa73 100644
--- a/src/net.h
+++ b/src/net.h
@@ -430,7 +430,7 @@ public:
             nRequestTime = it->second;
         else
             nRequestTime = 0;
-        LogPrint("net", "askfor %s   %d (%s)\n", inv.ToString().c_str(), nRequestTime, DateTimeStrFormat("%H:%M:%S", nRequestTime/1000000).c_str());
+        LogPrint("net", "askfor %s   %d (%s)\n", inv.ToString(), nRequestTime, DateTimeStrFormat("%H:%M:%S", nRequestTime/1000000).c_str());
 
         // Make sure not to reuse time indexes to keep things in the same order
         int64_t nNow = GetTimeMicros() - 1000000;
diff --git a/src/script.h b/src/script.h
index 0d8a8544..aed2b7a6 100644
--- a/src/script.h
+++ b/src/script.h
@@ -722,7 +722,7 @@ public:
 
     void print() const
     {
-        LogPrintf("%s\n", ToString().c_str());
+        LogPrintf("%s\n", ToString());
     }
 
     CScriptID GetID() const
diff --git a/src/wallet.h b/src/wallet.h
index b2c06d3f..81dfbba9 100644
--- a/src/wallet.h
+++ b/src/wallet.h
@@ -720,12 +720,12 @@ public:
 
     std::string ToString() const
     {
-        return strprintf("COutput(%s, %d, %d) [%s]", tx->GetHash().ToString().c_str(), i, nDepth, FormatMoney(tx->vout[i].nValue).c_str());
+        return strprintf("COutput(%s, %d, %d) [%s]", tx->GetHash().ToString(), i, nDepth, FormatMoney(tx->vout[i].nValue).c_str());
     }
 
     void print() const
     {
-        LogPrintf("%s\n", ToString().c_str());
+        LogPrintf("%s\n", ToString());
     }
 };