diff --git a/core/misc/ajax.js b/core/misc/ajax.js
index 507a40b..7b7f3a0 100644
--- a/core/misc/ajax.js
+++ b/core/misc/ajax.js
@@ -272,7 +272,7 @@
    */
   Drupal.ajax.expired = function () {
     return Drupal.ajax.instances.filter(function (instance) {
-      return instance && instance.element !== false && !document.body.contains(instance.element);
+      return instance && instance.element !== false && !document.body.contains(instance.element[0]);
     });
   };