Index: hierarchical_select.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/hierarchical_select/hierarchical_select.module,v
retrieving revision 1.154
diff -u -p -r1.154 hierarchical_select.module
--- hierarchical_select.module	10 Mar 2009 22:21:38 -0000	1.154
+++ hierarchical_select.module	19 Mar 2009 08:37:10 -0000
@@ -1423,7 +1423,7 @@ function _hierarchical_select_store_name
  *   otherwise.
  */
 function _hierarchical_select_form_has_hierarchical_select($form) {
-  if ($form['#type'] == 'hierarchical_select') {
+  if (isset($form['#type']) && $form['#type'] == 'hierarchical_select') {
     return TRUE;
   }
   else {