diff --git a/src/rpcblockchain.cpp b/src/rpcblockchain.cpp
index 7d6890f74..2f145d3e7 100644
--- a/src/rpcblockchain.cpp
+++ b/src/rpcblockchain.cpp
@@ -118,6 +118,7 @@ UniValue blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool tx
     result.push_back(Pair("height", blockindex->nHeight));
     result.push_back(Pair("version", block.nVersion));
     result.push_back(Pair("merkleroot", block.hashMerkleRoot.GetHex()));
+    result.push_back(Pair("hashReserved", blockindex->hashReserved.GetHex()));
     UniValue txs(UniValue::VARR);
     BOOST_FOREACH(const CTransaction&tx, block.vtx)
     {