diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index 257c88e5b27..4d04b6ef6db 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -364,7 +364,7 @@ void CTxMemPool::addUnchecked(const uint256& hash, const CTxMemPoolEntry &entry,
     // Update transaction for any feeDelta created by PrioritiseTransaction
     // TODO: refactor so that the fee delta is calculated before inserting
     // into mapTx.
-    std::map<uint256, CAmount>::const_iterator pos = mapDeltas.find(hash);
+    std::map<uint256, CAmount>::const_iterator pos = mapDeltas.find(entry.GetTx().GetHash());
     if (pos != mapDeltas.end()) {
         const CAmount &delta = pos->second;
         if (delta) {