diff --git a/websocket-sharp/Net/HttpListener.cs b/websocket-sharp/Net/HttpListener.cs
index f50d17ee..629d419b 100644
--- a/websocket-sharp/Net/HttpListener.cs
+++ b/websocket-sharp/Net/HttpListener.cs
@@ -958,8 +958,7 @@ namespace WebSocketSharp.Net
         cleanupContextRegistry ();
 
         var msg = "The listener is stopped.";
-        var ex = new HttpListenerException (995, msg);
-        cleanupWaitQueue (ex);
+        cleanupWaitQueue (msg);
 
         EndPointManager.RemoveListener (this);
       }