diff --git a/booking.variety_form.inc b/booking.variety_form.inc
index 7fa31b6..7548b93 100644
--- a/booking.variety_form.inc
+++ b/booking.variety_form.inc
@@ -152,7 +152,7 @@ function booking_variety_session_callback($form, &$form_state) {
     //$form['variety-sessions'][$fieldname]['#options'] = $options;
     
     // Tell drupal to update the wrapper for this field
-    $commands[] = ajax_command_replace('#booking_variety_session_' . $timeslot->tid . 'wrapper', render($form['variety-sessions'][$fieldname]));
+    $commands[] = ajax_command_replace('#booking_variety_session_' . $timeslot->tid . '_wrapper', render($form['variety-sessions'][$fieldname]));
   }	
   
   $form_state['rebuild'] = TRUE;