diff --git a/admin_menu.module b/admin_menu.module
index 21bff9f..9ab5a35 100644
--- a/admin_menu.module
+++ b/admin_menu.module
@@ -338,6 +338,8 @@ function admin_menu_js_cache() {
   $cache = drupal_page_get_cache();
   if (is_object($cache)) {
     header('X-Drupal-Cache: HIT');
+    header('Access-Control-Allow-Origin:' . $base_url);
+    
     // Restore the metadata cached with the page.
     $_GET['q'] = $cache->data['path'];
     date_default_timezone_set(drupal_get_user_timezone());
@@ -350,6 +352,7 @@ function admin_menu_js_cache() {
 
   // Otherwise, create a new page response (that will be cached).
   header('X-Drupal-Cache: MISS');
+  header('Access-Control-Allow-Origin:' . $base_url);
 
   // The Expires HTTP header is the heart of the client-side HTTP caching. The
   // additional server-side page cache only takes effect when the client