diff --git a/websocket-sharp/Net/HttpConnection.cs b/websocket-sharp/Net/HttpConnection.cs
index d7563504..3ff5b9b9 100644
--- a/websocket-sharp/Net/HttpConnection.cs
+++ b/websocket-sharp/Net/HttpConnection.cs
@@ -523,7 +523,7 @@ namespace WebSocketSharp.Net
         }
 
         disposeRequestBuffer ();
-        unregisterContext ();
+        _context.Unregister ();
 
         _reuses++;