diff --git a/booking.variety_form.inc b/booking.variety_form.inc
index f31e0b2..dd52421 100644
--- a/booking.variety_form.inc
+++ b/booking.variety_form.inc
@@ -161,11 +161,11 @@ function booking_variety_regn_form_validate($form, &$form_state) {
   //check there is still room 
   foreach ($variety_timeslot_ids as $id) {
     $selected_session_id = $values['select-variety-' . $id];
-
-    if ($sessions[$selected_session_id]['booking_variety_regncount'] < $sessions[$selected_session_id]['booking_variety_maxsize']) {
+    $session = $sessions[$selected_session_id];
+    if ($session->booking_variety_regncount < $session->booking_variety_maxsize) {
       watchdog('booking_debug', 'Still room in session @id : @count is less than @size', array(
-        '@id' => $selected_session_id, '@count' => $sessions[$selected_session_id]['booking_variety_regncount'],
-        '@size' => $sessions[$selected_session_id]['booking_variety_maxsize']
+        '@id' => $selected_session_id, '@count' => $session->booking_variety_regncount,
+        '@size' => $session->booking_variety_maxsize
       ));
     }
   }