--- virtual_site/virtual_site.admin.inc	2008-02-20 11:55:15.000000000 -0500
+++ virtual_site/virtual_site.adminNew.inc	2008-02-20 11:54:55.000000000 -0500
@@ -121,7 +121,7 @@ function virtual_site_edit_form(&$form_s
 		'#default_value' => $site->name,
 	);
 	
-	$form = array_merge($form, module_invoke('condition', 'selection_form', $site->conditions));
+	$form = array_merge($form, (array) module_invoke('condition', 'selection_form', $site->conditions));
 
 	$form['submit'] = array(
 		'#type' => 'submit',