diff --git a/src/neo/Consensus/ConsensusService.cs b/src/neo/Consensus/ConsensusService.cs
index 5ead54d233..7276b9ea1b 100644
--- a/src/neo/Consensus/ConsensusService.cs
+++ b/src/neo/Consensus/ConsensusService.cs
@@ -247,7 +247,7 @@ private void OnCommitReceived(ConsensusPayload payload, Commit commit)
         // this function increases existing timer (never decreases) with a value proportional to `maxDelayInBlockTimes`*`Blockchain.MillisecondsPerBlock`
         private void ExtendTimerByFactor(int maxDelayInBlockTimes)
         {
-            TimeSpan nextDelay = expected_delay - (TimeProvider.Current.UtcNow - clock_started) + TimeSpan.FromMilliseconds(maxDelayInBlockTimes * Blockchain.MillisecondsPerBlock / context.M);
+            TimeSpan nextDelay = expected_delay - (TimeProvider.Current.UtcNow - clock_started) + TimeSpan.FromMilliseconds(maxDelayInBlockTimes * Blockchain.MillisecondsPerBlock / (double)context.M);
             if (!context.WatchOnly && !context.ViewChanging && !context.CommitSent && (nextDelay > TimeSpan.Zero))
                 ChangeTimer(nextDelay);
         }