diff --git a/include/ajax.tickets.php b/include/ajax.tickets.php
index 6869fe7076d668b578d097490dc464553b40b8a3..75e43fc4c7f29c018fdfa7abfab1f865d7260c4e 100644
--- a/include/ajax.tickets.php
+++ b/include/ajax.tickets.php
@@ -18,6 +18,7 @@ if(!defined('INCLUDE_DIR')) die('403');
 
 include_once(INCLUDE_DIR.'class.ticket.php');
 require_once(INCLUDE_DIR.'class.ajax.php');
+require_once(INCLUDE_DIR.'class.note.php');
 
 class TicketsAjaxAPI extends AjaxController {