diff --git a/admin_menu.module b/admin_menu.module
index b3f170c..8369e8d 100644
--- a/admin_menu.module
+++ b/admin_menu.module
@@ -186,6 +186,7 @@ function admin_menu_page_build(&$page) {
   // user, only output the hash for the client-side HTTP cache callback URL.
   $cid = 'admin_menu:' . $user->uid . ':' . session_id() . ':' . $language->language;
   if (!empty($_COOKIE['has_js']) && ($hash = admin_menu_cache_get($cid))) {
+    $GLOBALS['devel_shutdown'] = FALSE; // Prevent devel module from spewing.
     $settings['hash'] = $hash;
     // The base path to use for cache requests depends on whether clean URLs
     // are enabled, whether Drupal runs in a sub-directory, and on the language