diff --git a/src/alert.cpp b/src/alert.cpp
index 99164d63e5..638f0d7a1c 100644
--- a/src/alert.cpp
+++ b/src/alert.cpp
@@ -5,6 +5,7 @@
 
 #include "alert.h"
 
+#include "chainparams.h"
 #include "key.h"
 #include "net.h"
 #include "ui_interface.h"
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 109ee02b0a..3f4d7f7064 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -6,8 +6,6 @@
 #include "chainparams.h"
 
 #include "assert.h"
-#include "core.h"
-#include "protocol.h"
 #include "util.h"
 
 #include <boost/assign/list_of.hpp>
@@ -100,6 +98,7 @@ unsigned int pnSeed[] =
 class CMainParams : public CChainParams {
 public:
     CMainParams() {
+        networkID = CChainParams::MAIN;
         // The message start string is designed to be unlikely to occur in normal data.
         // The characters are rarely used upper ASCII, not valid as UTF-8, and produce
         // a large 4-byte int at any alignment.
@@ -171,27 +170,25 @@ public:
             addr.nTime = GetTime() - GetRand(nOneWeek) - nOneWeek;
             vFixedSeeds.push_back(addr);
         }
-    }
 
-    virtual const CBlock& GenesisBlock() const { return genesis; }
-    virtual Network NetworkID() const { return CChainParams::MAIN; }
-
-    virtual const vector<CAddress>& FixedSeeds() const {
-        return vFixedSeeds;
+        fRequireRPCPassword = true;
+        fMiningRequiresPeers = true;
+        fDefaultCheckMemPool = false;
+        fAllowMinDifficultyBlocks = false;
+        fRequireStandard = true;
+        fRPCisTestNet = false;
+        fMineBlocksOnDemand = false;
     }
-protected:
-    CBlock genesis;
-    vector<CAddress> vFixedSeeds;
 };
 static CMainParams mainParams;
 
-
 //
 // Testnet (v3)
 //
 class CTestNetParams : public CMainParams {
 public:
     CTestNetParams() {
+        networkID = CChainParams::TESTNET;
         // The message start string is designed to be unlikely to occur in normal data.
         // The characters are rarely used upper ASCII, not valid as UTF-8, and produce
         // a large 4-byte int at any alignment.
@@ -223,22 +220,25 @@ public:
         base58Prefixes[SECRET_KEY]     = list_of(239);
         base58Prefixes[EXT_PUBLIC_KEY] = list_of(0x04)(0x35)(0x87)(0xCF);
         base58Prefixes[EXT_SECRET_KEY] = list_of(0x04)(0x35)(0x83)(0x94);
-    }
 
-    virtual bool AllowMinDifficultyBlocks() const { return true; }
-    virtual bool RequireStandard() const { return false; }
-    virtual bool RPCisTestNet() const { return true; }
-    virtual Network NetworkID() const { return CChainParams::TESTNET; }
+        fRequireRPCPassword = true;
+        fMiningRequiresPeers = true;
+        fDefaultCheckMemPool = false;
+        fAllowMinDifficultyBlocks = true;
+        fRequireStandard = false;
+        fRPCisTestNet = true;
+        fMineBlocksOnDemand = false;
+    }
 };
 static CTestNetParams testNetParams;
 
-
 //
 // Regression test
 //
 class CRegTestParams : public CTestNetParams {
 public:
     CRegTestParams() {
+        networkID = CChainParams::REGTEST;
         pchMessageStart[0] = 0xfa;
         pchMessageStart[1] = 0xbf;
         pchMessageStart[2] = 0xb5;
@@ -258,14 +258,15 @@ public:
         assert(hashGenesisBlock == uint256("0x0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"));
 
         vSeeds.clear();  // Regtest mode doesn't have any DNS seeds.
-    }
 
-    virtual bool RequireRPCPassword() const { return false; }
-    virtual bool MiningRequiresPeers() const { return false; }
-    virtual bool MineBlocksOnDemand() const { return true; }
-    virtual bool DefaultCheckMemPool() const { return true; }
-    virtual bool RequireStandard() const { return false; }
-    virtual Network NetworkID() const { return CChainParams::REGTEST; }
+        fRequireRPCPassword = false;
+        fMiningRequiresPeers = false;
+        fDefaultCheckMemPool = true;
+        fAllowMinDifficultyBlocks = true;
+        fRequireStandard = false;
+        fRPCisTestNet = true;
+        fMineBlocksOnDemand = true;
+    }
 };
 static CRegTestParams regTestParams;
 
diff --git a/src/chainparams.h b/src/chainparams.h
index 653ca20f01..988e3ac3a4 100644
--- a/src/chainparams.h
+++ b/src/chainparams.h
@@ -7,17 +7,15 @@
 #define BITCOIN_CHAIN_PARAMS_H
 
 #include "uint256.h"
+#include "core.h"
+#include "protocol.h"
 
 #include <vector>
 
 using namespace std;
 
-#define MESSAGE_START_SIZE 4
 typedef unsigned char MessageStartChars[MESSAGE_START_SIZE];
 
-class CAddress;
-class CBlock;
-
 struct CDNSSeedData {
     string name, host;
     CDNSSeedData(const string &strName, const string &strHost) : name(strName), host(strHost) {}
@@ -64,26 +62,26 @@ public:
 
     /* Used if GenerateBitcoins is called with a negative number of threads */
     int DefaultMinerThreads() const { return nMinerThreads; }
-    virtual const CBlock& GenesisBlock() const = 0;
-    virtual bool RequireRPCPassword() const { return true; }
+    const CBlock& GenesisBlock() const { return genesis; };
+    bool RequireRPCPassword() const { return fRequireRPCPassword; }
     /* Make miner wait to have peers to avoid wasting work */
-    virtual bool MiningRequiresPeers() const { return true; }
+    bool MiningRequiresPeers() const { return fMiningRequiresPeers; }
     /* Default value for -checkmempool argument */
-    virtual bool DefaultCheckMemPool() const { return false; }
+    bool DefaultCheckMemPool() const { return fDefaultCheckMemPool; }
     /* Allow mining of a min-difficulty block */
-    virtual bool AllowMinDifficultyBlocks() const { return false; }
+    bool AllowMinDifficultyBlocks() const { return fAllowMinDifficultyBlocks; }
     /* Make standard checks */
-    virtual bool RequireStandard() const { return true; }
+    bool RequireStandard() const { return fRequireStandard; }
     /* Make standard checks */
-    virtual bool RPCisTestNet() const { return false; }
+    bool RPCisTestNet() const { return fRPCisTestNet; }
     const string& DataDir() const { return strDataDir; }
     /* Make miner stop after a block is found. In RPC, don't return
      * until nGenProcLimit blocks are generated */
-    virtual bool MineBlocksOnDemand() const { return false; }
-    virtual Network NetworkID() const = 0;
+    bool MineBlocksOnDemand() const { return fMineBlocksOnDemand; }
+    Network NetworkID() const { return networkID; }
     const vector<CDNSSeedData>& DNSSeeds() const { return vSeeds; }
-    const std::vector<unsigned char> &Base58Prefix(Base58Type type) const { return base58Prefixes[type]; }
-    virtual const vector<CAddress>& FixedSeeds() const = 0;
+    const std::vector<unsigned char>& Base58Prefix(Base58Type type) const { return base58Prefixes[type]; }
+    const vector<CAddress>& FixedSeeds() const { return vFixedSeeds; }
     int RPCPort() const { return nRPCPort; }
 protected:
     CChainParams() {}
@@ -103,6 +101,16 @@ protected:
     int nMinerThreads;
     vector<CDNSSeedData> vSeeds;
     std::vector<unsigned char> base58Prefixes[MAX_BASE58_TYPES];
+    Network networkID;
+    CBlock genesis;
+    vector<CAddress> vFixedSeeds;
+    bool fRequireRPCPassword;
+    bool fMiningRequiresPeers;
+    bool fDefaultCheckMemPool;
+    bool fAllowMinDifficultyBlocks;
+    bool fRequireStandard;
+    bool fRPCisTestNet;
+    bool fMineBlocksOnDemand;
 };
 
 /**
diff --git a/src/protocol.cpp b/src/protocol.cpp
index c77a92f020..87b2f23873 100644
--- a/src/protocol.cpp
+++ b/src/protocol.cpp
@@ -5,6 +5,7 @@
 
 #include "protocol.h"
 
+#include "chainparams.h"
 #include "util.h"
 
 #ifndef WIN32
diff --git a/src/protocol.h b/src/protocol.h
index e6f105fe5c..6de5d05a72 100644
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -10,7 +10,6 @@
 #ifndef __INCLUDED_PROTOCOL_H__
 #define __INCLUDED_PROTOCOL_H__
 
-#include "chainparams.h"
 #include "netbase.h"
 #include "serialize.h"
 #include "uint256.h"
@@ -19,6 +18,8 @@
 #include <stdint.h>
 #include <string>
 
+#define MESSAGE_START_SIZE 4
+
 /** Message header.
  * (4) message start.
  * (12) command.