diff --git a/lib/transports/websocket.js b/lib/transports/websocket.js
index f9c4b7a46..3d6c50931 100644
--- a/lib/transports/websocket.js
+++ b/lib/transports/websocket.js
@@ -245,6 +245,7 @@ WS.prototype.onClose = function () {
 
 WS.prototype.doClose = function () {
   if (typeof this.ws !== 'undefined') {
+    this.ws.onerror = () => {};
     this.ws.close();
   }
 };