diff --git a/websocket-sharp/Server/WebSocketBehavior.cs b/websocket-sharp/Server/WebSocketBehavior.cs
index b5e8ffeb..94f7219c 100644
--- a/websocket-sharp/Server/WebSocketBehavior.cs
+++ b/websocket-sharp/Server/WebSocketBehavior.cs
@@ -457,13 +457,6 @@ namespace WebSocketSharp.Server
 
     internal void Start (WebSocketContext context, WebSocketSessionManager sessions)
     {
-      if (_websocket != null) {
-        _websocket.Log.Error ("A session instance cannot be reused.");
-        context.WebSocket.Close (HttpStatusCode.ServiceUnavailable);
-
-        return;
-      }
-
       _context = context;
       _sessions = sessions;