diff --git a/websocket-sharp/Server/WebSocketSessionManager.cs b/websocket-sharp/Server/WebSocketSessionManager.cs
index 74c81c08..50f11c94 100644
--- a/websocket-sharp/Server/WebSocketSessionManager.cs
+++ b/websocket-sharp/Server/WebSocketSessionManager.cs
@@ -289,13 +289,8 @@ namespace WebSocketSharp.Server
         }
 
         lock (_sync) {
-          string msg;
-
-          if (!canSet (out msg)) {
-            _log.Warn (msg);
-
+          if (!canSet ())
             return;
-          }
 
           _waitTime = value;
         }