diff --git a/websocket-sharp/Server/WebSocketServiceManager.cs b/websocket-sharp/Server/WebSocketServiceManager.cs
index 8706f58f..902e5534 100644
--- a/websocket-sharp/Server/WebSocketServiceManager.cs
+++ b/websocket-sharp/Server/WebSocketServiceManager.cs
@@ -409,7 +409,7 @@ namespace WebSocketSharp.Server
     internal void Add<TBehavior> (string path, Func<TBehavior> creator)
       where TBehavior : WebSocketBehavior
     {
-      path = HttpUtility.UrlDecode (path).TrimSlashFromEnd ();
+      path = path.TrimSlashFromEnd ();
 
       lock (_sync) {
         WebSocketServiceHost host;