diff --git a/js/media.popups.js b/js/media.popups.js
index c8cf2a0a16ca2a55eb420ef70f9818cdba403c4c..d7d7d0dcd207d251b38714ca044eff5f70fcbae2 100644
--- a/js/media.popups.js
+++ b/js/media.popups.js
@@ -128,7 +128,8 @@ Drupal.media.popups.mediaBrowser.mediaBrowserOnLoad = function (e) {
   var options = e.data;
 
   // Ensure that the iFrame is defined.
-  if (this.contentWindow.Drupal.media == undefined) {
+  if (typeof this.contentWindow.Drupal.media === 'undefined' || typeof
+  this.contentWindow.Drupal.media.browser === 'undefined') {
     return;
   }