diff --git a/src/bench/bench.cpp b/src/bench/bench.cpp
index b0df3d2b0..33631d2d1 100644
--- a/src/bench/bench.cpp
+++ b/src/bench/bench.cpp
@@ -5,6 +5,7 @@
 #include "bench.h"
 #include "perf.h"
 
+#include <assert.h>
 #include <iostream>
 #include <iomanip>
 #include <sys/time.h>
diff --git a/src/bench/bench.h b/src/bench/bench.h
index f12a41126..1f36f2a4b 100644
--- a/src/bench/bench.h
+++ b/src/bench/bench.h
@@ -5,10 +5,11 @@
 #ifndef BITCOIN_BENCH_BENCH_H
 #define BITCOIN_BENCH_BENCH_H
 
+#include <functional>
+#include <limits>
 #include <map>
 #include <string>
 
-#include <boost/function.hpp>
 #include <boost/preprocessor/cat.hpp>
 #include <boost/preprocessor/stringize.hpp>
 
@@ -59,7 +60,7 @@ namespace benchmark {
         bool KeepRunning();
     };
 
-    typedef boost::function<void(State&)> BenchFunction;
+    typedef std::function<void(State&)> BenchFunction;
 
     class BenchRunner
     {
diff --git a/src/httprpc.cpp b/src/httprpc.cpp
index 18a9819ed..5ab6d8d73 100644
--- a/src/httprpc.cpp
+++ b/src/httprpc.cpp
@@ -30,7 +30,7 @@ static const char* WWW_AUTH_HEADER_DATA = "Basic realm=\"jsonrpc\"";
 class HTTPRPCTimer : public RPCTimerBase
 {
 public:
-    HTTPRPCTimer(struct event_base* eventBase, boost::function<void(void)>& func, int64_t millis) :
+    HTTPRPCTimer(struct event_base* eventBase, std::function<void(void)>& func, int64_t millis) :
         ev(eventBase, false, func)
     {
         struct timeval tv;
@@ -52,7 +52,7 @@ public:
     {
         return "HTTP";
     }
-    RPCTimerBase* NewTimer(boost::function<void(void)>& func, int64_t millis)
+    RPCTimerBase* NewTimer(std::function<void(void)>& func, int64_t millis)
     {
         return new HTTPRPCTimer(base, func, millis);
     }
diff --git a/src/init.cpp b/src/init.cpp
index 337590ac6..3bbdb16c3 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -59,7 +59,6 @@
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/algorithm/string/split.hpp>
 #include <boost/bind.hpp>
-#include <boost/function.hpp>
 #include <boost/interprocess/sync/file_lock.hpp>
 #include <boost/thread.hpp>
 #include <openssl/crypto.h>
diff --git a/src/qt/rpcconsole.cpp b/src/qt/rpcconsole.cpp
index 2ff78c75c..b200cb112 100644
--- a/src/qt/rpcconsole.cpp
+++ b/src/qt/rpcconsole.cpp
@@ -98,7 +98,7 @@ class QtRPCTimerBase: public QObject, public RPCTimerBase
 {
     Q_OBJECT
 public:
-    QtRPCTimerBase(boost::function<void(void)>& _func, int64_t millis):
+    QtRPCTimerBase(std::function<void(void)>& _func, int64_t millis):
         func(_func)
     {
         timer.setSingleShot(true);
@@ -110,7 +110,7 @@ private Q_SLOTS:
     void timeout() { func(); }
 private:
     QTimer timer;
-    boost::function<void(void)> func;
+    std::function<void(void)> func;
 };
 
 class QtRPCTimerInterface: public RPCTimerInterface
@@ -118,7 +118,7 @@ class QtRPCTimerInterface: public RPCTimerInterface
 public:
     ~QtRPCTimerInterface() {}
     const char *Name() { return "Qt"; }
-    RPCTimerBase* NewTimer(boost::function<void(void)>& func, int64_t millis)
+    RPCTimerBase* NewTimer(std::function<void(void)>& func, int64_t millis)
     {
         return new QtRPCTimerBase(func, millis);
     }
diff --git a/src/rpc/server.cpp b/src/rpc/server.cpp
index ea93e8cc7..c5fbff007 100644
--- a/src/rpc/server.cpp
+++ b/src/rpc/server.cpp
@@ -44,17 +44,17 @@ static struct CRPCSignals
     boost::signals2::signal<void (const CRPCCommand&)> PreCommand;
 } g_rpcSignals;
 
-void RPCServer::OnStarted(boost::function<void ()> slot)
+void RPCServer::OnStarted(std::function<void ()> slot)
 {
     g_rpcSignals.Started.connect(slot);
 }
 
-void RPCServer::OnStopped(boost::function<void ()> slot)
+void RPCServer::OnStopped(std::function<void ()> slot)
 {
     g_rpcSignals.Stopped.connect(slot);
 }
 
-void RPCServer::OnPreCommand(boost::function<void (const CRPCCommand&)> slot)
+void RPCServer::OnPreCommand(std::function<void (const CRPCCommand&)> slot)
 {
     g_rpcSignals.PreCommand.connect(boost::bind(slot, _1));
 }
@@ -536,7 +536,7 @@ void RPCUnsetTimerInterface(RPCTimerInterface *iface)
         timerInterface = NULL;
 }
 
-void RPCRunLater(const std::string& name, boost::function<void(void)> func, int64_t nSeconds)
+void RPCRunLater(const std::string& name, std::function<void(void)> func, int64_t nSeconds)
 {
     if (!timerInterface)
         throw JSONRPCError(RPC_INTERNAL_ERROR, "No timer handler registered for RPC");
diff --git a/src/rpc/server.h b/src/rpc/server.h
index 34a9d3c24..1e984cbc0 100644
--- a/src/rpc/server.h
+++ b/src/rpc/server.h
@@ -15,8 +15,6 @@
 #include <stdint.h>
 #include <string>
 
-#include <boost/function.hpp>
-
 #include <univalue.h>
 
 static const unsigned int DEFAULT_RPC_SERIALIZE_VERSION = 1;
@@ -25,9 +23,9 @@ class CRPCCommand;
 
 namespace RPCServer
 {
-    void OnStarted(boost::function<void ()> slot);
-    void OnStopped(boost::function<void ()> slot);
-    void OnPreCommand(boost::function<void (const CRPCCommand&)> slot);
+    void OnStarted(std::function<void ()> slot);
+    void OnStopped(std::function<void ()> slot);
+    void OnPreCommand(std::function<void (const CRPCCommand&)> slot);
 }
 
 class CBlockIndex;
@@ -115,7 +113,7 @@ public:
      * This is needed to cope with the case in which there is no HTTP server, but
      * only GUI RPC console, and to break the dependency of pcserver on httprpc.
      */
-    virtual RPCTimerBase* NewTimer(boost::function<void(void)>& func, int64_t millis) = 0;
+    virtual RPCTimerBase* NewTimer(std::function<void(void)>& func, int64_t millis) = 0;
 };
 
 /** Set the factory function for timers */
@@ -129,7 +127,7 @@ void RPCUnsetTimerInterface(RPCTimerInterface *iface);
  * Run func nSeconds from now.
  * Overrides previous timer <name> (if any).
  */
-void RPCRunLater(const std::string& name, boost::function<void(void)> func, int64_t nSeconds);
+void RPCRunLater(const std::string& name, std::function<void(void)> func, int64_t nSeconds);
 
 typedef UniValue(*rpcfn_type)(const JSONRPCRequest& jsonRequest);
 
diff --git a/src/scheduler.h b/src/scheduler.h
index 613fc1653..27412a15b 100644
--- a/src/scheduler.h
+++ b/src/scheduler.h
@@ -7,8 +7,8 @@
 
 //
 // NOTE:
-// boost::thread / boost::function / boost::chrono should be ported to
-// std::thread / std::function / std::chrono when we support C++11.
+// boost::thread / boost::chrono should be ported to std::thread / std::chrono
+// when we support C++11.
 //
 #include <boost/chrono/chrono.hpp>
 #include <boost/thread.hpp>
diff --git a/src/torcontrol.cpp b/src/torcontrol.cpp
index c1bd95b00..9e615142c 100644
--- a/src/torcontrol.cpp
+++ b/src/torcontrol.cpp
@@ -14,7 +14,6 @@
 #include <set>
 #include <stdlib.h>
 
-#include <boost/function.hpp>
 #include <boost/bind.hpp>
 #include <boost/signals2/signal.hpp>
 #include <boost/foreach.hpp>
@@ -73,8 +72,8 @@ public:
 class TorControlConnection
 {
 public:
-    typedef boost::function<void(TorControlConnection&)> ConnectionCB;
-    typedef boost::function<void(TorControlConnection &,const TorControlReply &)> ReplyHandlerCB;
+    typedef std::function<void(TorControlConnection&)> ConnectionCB;
+    typedef std::function<void(TorControlConnection &,const TorControlReply &)> ReplyHandlerCB;
 
     /** Create a new TorControlConnection.
      */
@@ -105,9 +104,9 @@ public:
     boost::signals2::signal<void(TorControlConnection &,const TorControlReply &)> async_handler;
 private:
     /** Callback when ready for use */
-    boost::function<void(TorControlConnection&)> connected;
+    std::function<void(TorControlConnection&)> connected;
     /** Callback when connection lost */
-    boost::function<void(TorControlConnection&)> disconnected;
+    std::function<void(TorControlConnection&)> disconnected;
     /** Libevent event base */
     struct event_base *base;
     /** Connection to control socket */
diff --git a/src/txdb.cpp b/src/txdb.cpp
index a3889fdf7..42dc31760 100644
--- a/src/txdb.cpp
+++ b/src/txdb.cpp
@@ -169,7 +169,7 @@ bool CBlockTreeDB::ReadFlag(const std::string &name, bool &fValue) {
     return true;
 }
 
-bool CBlockTreeDB::LoadBlockIndexGuts(boost::function<CBlockIndex*(const uint256&)> insertBlockIndex)
+bool CBlockTreeDB::LoadBlockIndexGuts(std::function<CBlockIndex*(const uint256&)> insertBlockIndex)
 {
     std::unique_ptr<CDBIterator> pcursor(NewIterator());
 
diff --git a/src/txdb.h b/src/txdb.h
index d9214ba61..117e7201f 100644
--- a/src/txdb.h
+++ b/src/txdb.h
@@ -15,8 +15,6 @@
 #include <utility>
 #include <vector>
 
-#include <boost/function.hpp>
-
 class CBlockIndex;
 class CCoinsViewDBCursor;
 class uint256;
@@ -122,7 +120,7 @@ public:
     bool WriteTxIndex(const std::vector<std::pair<uint256, CDiskTxPos> > &list);
     bool WriteFlag(const std::string &name, bool fValue);
     bool ReadFlag(const std::string &name, bool &fValue);
-    bool LoadBlockIndexGuts(boost::function<CBlockIndex*(const uint256&)> insertBlockIndex);
+    bool LoadBlockIndexGuts(std::function<CBlockIndex*(const uint256&)> insertBlockIndex);
 };
 
 #endif // BITCOIN_TXDB_H