diff --git a/booking.variety_admin.inc b/booking.variety_admin.inc
index 4a25e54..af2e538 100644
--- a/booking.variety_admin.inc
+++ b/booking.variety_admin.inc
@@ -387,10 +387,14 @@ function booking_varietysessions_csv_report($timeslot_id) {
   }  	
 
   //retrieve the sessions for the specified timeslot
-  $variety_sessions = db_query("SELECT * FROM {booking_variety_sessions} WHERE booking_eventid = :eid and booking_variety_timeslot_id = :tid",
-                      array(':eid' => $event->eid, ':tid' => $timeslot_id));
-      
-  if (! $variety_sessions) {
+  $variety_sessions = db_select('booking_variety_sessions', 'v');
+  $db_and = db_and();
+  $db_and->condition('v.booking_eventid', $event->eid, '=');
+  $db_and->condition('v.booking_variety_timeslot_id', $timeslot_id, '=');
+  $variety_sessions->fields('v')
+    ->execute();
+
+  if ($variety_sessions->rowCount() == 0) {
     drupal_set_message("Error: Could not find matching variety session timeslot. Unable to view session membership.", 'error', FALSE);
     drupal_goto('admin/config/booking/variety');
     return "";