diff --git a/booking.variety_form.inc b/booking.variety_form.inc
index 6316686..d8a3b6d 100644
--- a/booking.variety_form.inc
+++ b/booking.variety_form.inc
@@ -97,7 +97,7 @@ function booking_variety_session_callback($form, &$form_state) {
     );
     
     
-    $commands[] = ajax_command_replace(NULL, drupal_render($form['variety-sessions'][$fieldname]));
+    $commands[] = ajax_command_replace('booking_variety_session_wrapper', drupal_render($form['variety-sessions'][$fieldname]));
 
 
   }