diff --git a/lib/action.php b/lib/action.php
index 715072d1ee..1b4cb5cecb 100644
--- a/lib/action.php
+++ b/lib/action.php
@@ -253,6 +253,7 @@ class Action extends HTMLOutputter // lawsuit
                 $this->script('js/jquery.min.js');
                 $this->script('js/jquery.form.js');
                 $this->script('js/jquery.cookie.js');
+                $this->script('js/json2.js');
                 $this->script('js/jquery.joverlay.min.js');
                 Event::handle('EndShowJQueryScripts', array($this));
             }