diff --git a/src/rpcblockchain.cpp b/src/rpcblockchain.cpp
index ba08e89ab..368d0af4c 100644
--- a/src/rpcblockchain.cpp
+++ b/src/rpcblockchain.cpp
@@ -97,7 +97,7 @@ UniValue blockheaderToJSON(const CBlockIndex* blockindex)
 UniValue blockToDeltasJSON(const CBlock& block, const CBlockIndex* blockindex)
 {
     UniValue result(UniValue::VOBJ);
-    result.push_back(Pair("hash", block.GetHash().GetHex()));
+    result.push_back(Pair("hash", blockindex->GetBlockHash().GetHex()));
     int confirmations = -1;
     // Only report confirmations if the block is on the main chain
     if (chainActive.Contains(blockindex)) {