1 files changed, 7 insertions, 6 deletions

diff --git a/src/chain.h b/src/chain.h
index 98db989879..004e87ab52 100644
--- a/src/chain.h
+++ b/src/chain.h
@@ -1,11 +1,12 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin developers
+// Copyright (c) 2009-2014 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_CHAIN_H
 #define BITCOIN_CHAIN_H
 
+#include "arith_uint256.h"
 #include "primitives/block.h"
 #include "pow.h"
 #include "tinyformat.h"
@@ -117,7 +118,7 @@ public:
     unsigned int nUndoPos;
 
     //! (memory only) Total amount of work (expected number of hashes) in the chain up to and including this block
-    uint256 nChainWork;
+    arith_uint256 nChainWork;
 
     //! Number of transactions in this block.
     //! Note: in a potential headers-first mode, this number cannot be relied upon
@@ -150,14 +151,14 @@ public:
         nFile = 0;
         nDataPos = 0;
         nUndoPos = 0;
-        nChainWork = 0;
+        nChainWork = arith_uint256();
         nTx = 0;
         nChainTx = 0;
         nStatus = 0;
         nSequenceId = 0;
 
         nVersion       = 0;
-        hashMerkleRoot = 0;
+        hashMerkleRoot = uint256();
         nTime          = 0;
         nBits          = 0;
         nNonce         = 0;
@@ -282,11 +283,11 @@ public:
     uint256 hashPrev;
 
     CDiskBlockIndex() {
-        hashPrev = 0;
+        hashPrev = uint256();
     }
 
     explicit CDiskBlockIndex(const CBlockIndex* pindex) : CBlockIndex(*pindex) {
-        hashPrev = (pprev ? pprev->GetBlockHash() : 0);
+        hashPrev = (pprev ? pprev->GetBlockHash() : uint256());
     }
 
     ADD_SERIALIZE_METHODS;