diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 73ce98366..87f5c165d 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -2217,7 +2217,8 @@ bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qbloc
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
 
   bool result = find_blockchain_supplement(qblock_ids, resp.m_block_ids, resp.start_height, resp.total_height);
-  resp.cumulative_difficulty = m_db->get_block_cumulative_difficulty(resp.total_height - 1);
+  if (result)
+    resp.cumulative_difficulty = m_db->get_block_cumulative_difficulty(resp.total_height - 1);
 
   return result;
 }