diff --git a/repository/equella/callback.php b/repository/equella/callback.php
index 2c1c3dcddf7..5829b005e3f 100644
--- a/repository/equella/callback.php
+++ b/repository/equella/callback.php
@@ -23,6 +23,8 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 require_once(dirname(dirname(dirname(__FILE__))).'/config.php');
+require_once($CFG->dirroot . '/repository/lib.php');
+
 $json = required_param('tlelinks', PARAM_RAW);
 
 require_login();