diff --git a/mod/quiz/locallib.php b/mod/quiz/locallib.php
index 424d6898547..de55f6fcf91 100644
--- a/mod/quiz/locallib.php
+++ b/mod/quiz/locallib.php
@@ -36,7 +36,8 @@ require_once($CFG->dirroot . '/mod/quiz/accessmanager.php');
 require_once($CFG->dirroot . '/mod/quiz/accessmanager_form.php');
 require_once($CFG->dirroot . '/mod/quiz/renderer.php');
 require_once($CFG->dirroot . '/mod/quiz/attemptlib.php');
-require_once($CFG->libdir  . '/eventslib.php');
+require_once($CFG->libdir . '/completionlib.php');
+require_once($CFG->libdir . '/eventslib.php');
 require_once($CFG->libdir . '/filelib.php');
 require_once($CFG->libdir . '/questionlib.php');