diff --git a/actions/designadminpanel.php b/actions/designadminpanel.php
index 024cbe2518..dcf5605af1 100644
--- a/actions/designadminpanel.php
+++ b/actions/designadminpanel.php
@@ -174,7 +174,7 @@ class DesignAdminPanelForm extends Form
 
         $themes = array_combine($themes, $themes);
 
-        $this->out->elementStart('ul');
+        $this->out->elementStart('ul', 'form_data');
         $this->out->elementStart('li');
 
         $this->out->dropdown('theme', _('Theme'),