diff --git a/src/Plugins/DBFTPlugin/Consensus/ConsensusService.OnMessage.cs b/src/Plugins/DBFTPlugin/Consensus/ConsensusService.OnMessage.cs
index b00fdd9393..6884026dc4 100644
--- a/src/Plugins/DBFTPlugin/Consensus/ConsensusService.OnMessage.cs
+++ b/src/Plugins/DBFTPlugin/Consensus/ConsensusService.OnMessage.cs
@@ -98,6 +98,9 @@ private void OnPrepareRequestReceived(ExtensiblePayload payload, PrepareRequest
             // around 2*15/M=30.0/5 ~ 40% block time (for M=5)
             ExtendTimerByFactor(2);
 
+            onPrepareReceivedTime = TimeProvider.Current.UtcNow;
+            onPrepareBlockIndex = message.BlockIndex;
+
             context.Block.Header.Timestamp = message.Timestamp;
             context.Block.Header.Nonce = message.Nonce;
             context.TransactionHashes = message.TransactionHashes;
diff --git a/src/Plugins/DBFTPlugin/Consensus/ConsensusService.cs b/src/Plugins/DBFTPlugin/Consensus/ConsensusService.cs
index ad1b88feb1..7bfa1ad78e 100644
--- a/src/Plugins/DBFTPlugin/Consensus/ConsensusService.cs
+++ b/src/Plugins/DBFTPlugin/Consensus/ConsensusService.cs
@@ -37,6 +37,8 @@ private class Timer { public uint Height; public byte ViewNumber; }
         private ICancelable timer_token;
         private DateTime block_received_time;
         private uint block_received_index;
+        private DateTime onPrepareReceivedTime;
+        private uint onPrepareBlockIndex;
         private bool started = false;
 
         /// <summary>
@@ -95,9 +97,10 @@ private void InitializeConsensus(byte viewNumber)
                 else
                 {
                     TimeSpan span = neoSystem.Settings.TimePerBlock;
-                    if (block_received_index + 1 == context.Block.Index)
+                    if (block_received_index + 1 == context.Block.Index && onPrepareBlockIndex + 1 == context.Block.Index)
                     {
-                        var diff = TimeProvider.Current.UtcNow - block_received_time;
+                        // Include the consensus time into the consensus intervals.
+                        var diff = TimeProvider.Current.UtcNow - onPrepareReceivedTime;
                         if (diff >= span)
                             span = TimeSpan.Zero;
                         else