diff --git a/Modbus.Net/Modbus.Net/Controller/FifoController.cs b/Modbus.Net/Modbus.Net/Controller/FifoController.cs
index 81a91e2..79a1acb 100644
--- a/Modbus.Net/Modbus.Net/Controller/FifoController.cs
+++ b/Modbus.Net/Modbus.Net/Controller/FifoController.cs
@@ -96,6 +96,7 @@ namespace Modbus.Net
         /// <inheritdoc />
         public override void SendStop()
         {
+            Clear();
             _taskCancel = true;
         }