diff --git a/src/db.cpp b/src/db.cpp
index fd4c67d5522..1f539176022 100644
--- a/src/db.cpp
+++ b/src/db.cpp
@@ -5,10 +5,12 @@
 
 #include "db.h"
 #include "util.h"
-#include "main.h"
+#include "hash.h"
+#include "addrman.h"
 #include <boost/version.hpp>
 #include <boost/filesystem.hpp>
 #include <boost/filesystem/fstream.hpp>
+#include <openssl/rand.h>
 
 #ifndef WIN32
 #include "sys/stat.h"
@@ -486,6 +488,7 @@ void CDBEnv::Flush(bool fShutdown)
 // CAddrDB
 //
 
+unsigned char CAddrDB::pchMessageStart[4] = { 0x00, 0x00, 0x00, 0x00 };
 
 CAddrDB::CAddrDB()
 {
@@ -501,7 +504,7 @@ bool CAddrDB::Write(const CAddrMan& addr)
 
     // serialize addresses, checksum data up to that point, then append csum
     CDataStream ssPeers(SER_DISK, CLIENT_VERSION);
-    ssPeers << FLATDATA(pchMessageStart);
+    ssPeers << FLATDATA(CAddrDB::pchMessageStart);
     ssPeers << addr;
     uint256 hash = Hash(ssPeers.begin(), ssPeers.end());
     ssPeers << hash;
@@ -566,11 +569,11 @@ bool CAddrDB::Read(CAddrMan& addr)
 
     unsigned char pchMsgTmp[4];
     try {
-        // de-serialize file header (pchMessageStart magic number) and
+        // de-serialize file header (CAddrDB::pchMessageStart magic number) and
         ssPeers >> FLATDATA(pchMsgTmp);
 
         // verify the network matches ours
-        if (memcmp(pchMsgTmp, pchMessageStart, sizeof(pchMsgTmp)))
+        if (memcmp(pchMsgTmp, CAddrDB::pchMessageStart, sizeof(pchMsgTmp)))
             return error("CAddrman::Read() : invalid network magic number");
 
         // de-serialize address data into one CAddrMan object
diff --git a/src/db.h b/src/db.h
index ea440c49607..92241f6cf21 100644
--- a/src/db.h
+++ b/src/db.h
@@ -5,22 +5,22 @@
 #ifndef BITCOIN_DB_H
 #define BITCOIN_DB_H
 
-#include "main.h"
+#include "sync.h"
+#include "serialize.h"
 
 #include <map>
 #include <string>
 #include <vector>
 
+#include <boost/filesystem.hpp>
 #include <db_cxx.h>
 
-class CAddress;
 class CAddrMan;
 class CBlockLocator;
 class CDiskBlockIndex;
 class CMasterKey;
 class COutPoint;
 class CWallet;
-class CWalletTx;
 
 extern unsigned int nWalletDBUpdated;
 
@@ -318,10 +318,14 @@ class CAddrDB
 {
 private:
     boost::filesystem::path pathAddr;
+    static unsigned char pchMessageStart[4];
+
 public:
     CAddrDB();
     bool Write(const CAddrMan& addr);
     bool Read(CAddrMan& addr);
+
+    static void SetMessageStart(unsigned char _pchMessageStart[]) { memcpy(CAddrDB::pchMessageStart, _pchMessageStart, sizeof(CAddrDB::pchMessageStart)); }
 };
 
 #endif // BITCOIN_DB_H
diff --git a/src/init.cpp b/src/init.cpp
index dcc43d8368a..e4cb2f1d00c 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -928,6 +928,7 @@ bool AppInit2(boost::thread_group& threadGroup)
     nStart = GetTimeMillis();
 
     {
+        CAddrDB::SetMessageStart(pchMessageStart);
         CAddrDB adb;
         if (!adb.Read(addrman))
             printf("Invalid or missing peers.dat; recreating\n");
diff --git a/src/wallet.h b/src/wallet.h
index 7fcb8e13cef..22dce78e915 100644
--- a/src/wallet.h
+++ b/src/wallet.h
@@ -5,6 +5,8 @@
 #ifndef BITCOIN_WALLET_H
 #define BITCOIN_WALLET_H
 
+#include "walletdb.h"
+
 #include <string>
 #include <vector>
 
@@ -16,12 +18,12 @@
 #include "script.h"
 #include "ui_interface.h"
 #include "util.h"
-#include "walletdb.h"
 
 class CAccountingEntry;
 class CWalletTx;
 class CReserveKey;
 class COutput;
+class CWalletDB;
 
 /** (client) version numbers for particular wallet features */
 enum WalletFeature
diff --git a/src/walletdb.h b/src/walletdb.h
index 8ae6c3ff496..9732eb29e46 100644
--- a/src/walletdb.h
+++ b/src/walletdb.h
@@ -11,6 +11,8 @@
 class CKeyPool;
 class CAccount;
 class CAccountingEntry;
+class CWallet;
+class CWalletTx;
 
 /** Error statuses for the wallet database */
 enum DBErrors
@@ -160,4 +162,6 @@ public:
     static bool Recover(CDBEnv& dbenv, std::string filename);
 };
 
+bool BackupWallet(const CWallet& wallet, const std::string& strDest);
+
 #endif // BITCOIN_WALLETDB_H