--- rsvp.admin.inc.orig	2009-11-05 23:36:48.000000000 +0100
+++ rsvp.admin.inc	2009-12-13 20:59:16.624750000 +0100
@@ -427,6 +427,7 @@ function rsvp_form_node_type_form_alter(
     $form['rsvp'] = array(
       '#type' => 'fieldset',
       '#title' => t('RSVP settings'),
+      '#group' => 'additional_settings',
       '#collapsible' => TRUE,
       '#collapsed' => TRUE,
     );