diff --git a/src/neo/Consensus/ConsensusService.cs b/src/neo/Consensus/ConsensusService.cs
index 788719ae14..b51d9acf7d 100644
--- a/src/neo/Consensus/ConsensusService.cs
+++ b/src/neo/Consensus/ConsensusService.cs
@@ -307,7 +307,9 @@ private void OnConsensusPayload(ConsensusPayload payload)
         private void OnPersistCompleted(Block block)
         {
             Log($"persist block: height={block.Index} hash={block.Hash} tx={block.Transactions.Length}");
-            block_received_time = TimeProvider.Current.UtcNow;
+            DateTime now = TimeProvider.Current.UtcNow;
+            block_received_gap = now - block_received_time;
+            block_received_time = now;
             knownHashes.Clear();
             InitializeConsensus(0);
         }