diff --git a/lib/websocket_extensions.js b/lib/websocket_extensions.js
index 25143c0..80e5e10 100644
--- a/lib/websocket_extensions.js
+++ b/lib/websocket_extensions.js
@@ -138,6 +138,7 @@ var instance = {
   },
 
   close: function(callback, context) {
+    if (!this._pipeline) return callback.call(context);
     this._pipeline.close(callback, context);
   },