diff --git a/src/db.cpp b/src/db.cpp
index c2c239db2..b67e2a645 100644
--- a/src/db.cpp
+++ b/src/db.cpp
@@ -3,6 +3,9 @@
 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
 
 #include "headers.h"
+#include "db.h"
+#include "net.h"
+#include <boost/filesystem/fstream.hpp>
 
 using namespace std;
 using namespace boost;
diff --git a/src/headers.h b/src/headers.h
index d40c5ed0a..9e81e27d1 100644
--- a/src/headers.h
+++ b/src/headers.h
@@ -48,7 +48,6 @@
 #include <limits.h>
 #include <float.h>
 #include <assert.h>
-#include <memory>
 #include <iostream>
 #include <sstream>
 #include <string>
@@ -56,29 +55,8 @@
 #include <list>
 #include <deque>
 #include <map>
-#include <set>
-#include <algorithm>
-#include <numeric>
+
 #include <boost/foreach.hpp>
-#include <boost/lexical_cast.hpp>
-#include <boost/tuple/tuple.hpp>
-#include <boost/tuple/tuple_comparison.hpp>
-#include <boost/tuple/tuple_io.hpp>
-#include <boost/array.hpp>
-#include <boost/bind.hpp>
-#include <boost/function.hpp>
-#include <boost/filesystem.hpp>
-#include <boost/filesystem/fstream.hpp>
-#include <boost/algorithm/string.hpp>
-#include <boost/thread.hpp>
-#include <boost/interprocess/sync/file_lock.hpp>
-#include <boost/interprocess/sync/interprocess_mutex.hpp>
-#include <boost/interprocess/sync/interprocess_recursive_mutex.hpp>
-#include <boost/date_time/gregorian/gregorian_types.hpp>
-#include <boost/date_time/posix_time/posix_time_types.hpp>
-#include <boost/config.hpp>
-#include <boost/program_options/detail/config_file.hpp>
-#include <boost/program_options/parsers.hpp>
 
 #ifdef __WXMSW__
 #include <windows.h>
@@ -110,7 +88,6 @@
 
 #pragma hdrstop
 
-#include "strlcpy.h"
 #include "serialize.h"
 #include "uint256.h"
 #include "util.h"
@@ -118,18 +95,13 @@
 #include "bignum.h"
 #include "base58.h"
 #include "script.h"
-#include "db.h"
-#include "net.h"
-#include "irc.h"
 #include "main.h"
-#include "rpc.h"
 #ifdef GUI
 #include "uibase.h"
 #include "ui.h"
 #else
 #include "noui.h"
 #endif
-#include "init.h"
 
 #ifdef GUI
 #include "xpm/addressbook16.xpm"
diff --git a/src/init.cpp b/src/init.cpp
index 0e2113e7c..b683e6678 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -2,6 +2,13 @@
 // Distributed under the MIT/X11 software license, see the accompanying
 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
 #include "headers.h"
+#include "db.h"
+#include "rpc.h"
+#include "net.h"
+#include "init.h"
+#include "strlcpy.h"
+#include <boost/filesystem/fstream.hpp>
+#include <boost/interprocess/sync/file_lock.hpp>
 
 using namespace std;
 using namespace boost;
diff --git a/src/irc.cpp b/src/irc.cpp
index a76374d14..cde934e80 100644
--- a/src/irc.cpp
+++ b/src/irc.cpp
@@ -3,6 +3,9 @@
 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
 
 #include "headers.h"
+#include "irc.h"
+#include "net.h"
+#include "strlcpy.h"
 
 using namespace std;
 using namespace boost;
diff --git a/src/main.cpp b/src/main.cpp
index 0456041ee..108842f3a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,7 +2,11 @@
 // Distributed under the MIT/X11 software license, see the accompanying
 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
 #include "headers.h"
+#include "db.h"
+#include "net.h"
+#include "init.h"
 #include "cryptopp/sha.h"
+#include <boost/filesystem/fstream.hpp>
 
 using namespace std;
 using namespace boost;
diff --git a/src/main.h b/src/main.h
index 436ffbecb..7aa6d41c3 100644
--- a/src/main.h
+++ b/src/main.h
@@ -24,6 +24,13 @@ class CBlockIndex;
 class CWalletTx;
 class CKeyItem;
 
+class CMessageHeader;
+class CAddress;
+class CInv;
+class CRequestTracker;
+class CNode;
+class CBlockIndex;
+
 static const unsigned int MAX_BLOCK_SIZE = 1000000;
 static const unsigned int MAX_BLOCK_SIZE_GEN = MAX_BLOCK_SIZE/2;
 static const int MAX_BLOCK_SIGOPS = MAX_BLOCK_SIZE/50;
@@ -78,6 +85,9 @@ extern int fUseUPnP;
 
 
 
+class CReserveKey;
+class CTxDB;
+class CTxIndex;
 
 bool CheckDiskSpace(uint64 nAdditionalBytes=0);
 FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode="rb");
diff --git a/src/net.cpp b/src/net.cpp
index ca6380fc7..8b439efdc 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -3,6 +3,11 @@
 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
 
 #include "headers.h"
+#include "irc.h"
+#include "db.h"
+#include "net.h"
+#include "init.h"
+#include "strlcpy.h"
 
 #ifdef USE_UPNP
 #include <miniupnpc/miniwget.h>
diff --git a/src/rpc.cpp b/src/rpc.cpp
index 530bef4a4..ad1abe333 100644
--- a/src/rpc.cpp
+++ b/src/rpc.cpp
@@ -4,12 +4,17 @@
 
 #include "headers.h"
 #include "cryptopp/sha.h"
+#include "db.h"
+#include "net.h"
+#include "init.h"
 #undef printf
 #include <boost/asio.hpp>
 #include <boost/iostreams/concepts.hpp>
 #include <boost/iostreams/stream.hpp>
+#include <boost/algorithm/string.hpp>
 #ifdef USE_SSL
 #include <boost/asio/ssl.hpp> 
+#include <boost/filesystem/fstream.hpp>
 typedef boost::asio::ssl::stream<boost::asio::ip::tcp::socket> SSLStream;
 #endif
 #include "json/json_spirit_reader_template.h"
diff --git a/src/ui.cpp b/src/ui.cpp
index cca473d82..0a7d45578 100644
--- a/src/ui.cpp
+++ b/src/ui.cpp
@@ -3,6 +3,10 @@
 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
 
 #include "headers.h"
+#include "init.h"
+#include "strlcpy.h"
+#include <boost/filesystem/fstream.hpp>
+#include <boost/filesystem/convenience.hpp>
 #ifdef _MSC_VER
 #include <crtdbg.h>
 #endif
diff --git a/src/util.cpp b/src/util.cpp
index 8d839e1ca..b95e23616 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -2,6 +2,13 @@
 // Distributed under the MIT/X11 software license, see the accompanying
 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
 #include "headers.h"
+#include "strlcpy.h"
+#include <boost/program_options/detail/config_file.hpp>
+#include <boost/program_options/parsers.hpp>
+#include <boost/filesystem/fstream.hpp>
+#include <boost/interprocess/sync/interprocess_mutex.hpp>
+#include <boost/interprocess/sync/interprocess_recursive_mutex.hpp>
+#include <boost/foreach.hpp>
 
 using namespace std;
 using namespace boost;
diff --git a/src/util.h b/src/util.h
index cd0761ee3..e7110570c 100644
--- a/src/util.h
+++ b/src/util.h
@@ -15,7 +15,6 @@
 #include <vector>
 #include <string>
 
-#include <boost/foreach.hpp>
 #include <boost/thread.hpp>
 #include <boost/interprocess/sync/interprocess_recursive_mutex.hpp>
 #include <boost/date_time/gregorian/gregorian_types.hpp>