diff --git a/misc/drupal.js b/misc/drupal.js
index af3de30..03eef50 100644
--- a/misc/drupal.js
+++ b/misc/drupal.js
@@ -419,7 +419,7 @@ Drupal.getSelection = function (element) {
  * This is primarily used by Drupal.displayAjaxError().
  */
 Drupal.beforeUnloadCalled = false;
-$(window).bind('beforeunload', function () {
+$(window).bind('beforeunload pagehide', function () {
     Drupal.beforeUnloadCalled = true;
 });