diff --git a/lib/devices/ios/safari.js b/lib/devices/ios/safari.js
index 7aef79a46..23f5807e4 100644
--- a/lib/devices/ios/safari.js
+++ b/lib/devices/ios/safari.js
@@ -151,7 +151,7 @@ Safari.prototype._stop = IOS.prototype.stop;
 Safari.prototype.stop = function (cb) {
   if (this.args.udid) {
     logger.debug("Stopping safariLauncher");
-    this.shutdown(null, null, cb);
+    this.shutdown(null, cb);
   } else {
     this._stop(cb);
   }