diff --git a/course/manage.php b/course/manage.php
index fbc384dd01f..df8c5f473ef 100644
--- a/course/manage.php
+++ b/course/manage.php
@@ -183,6 +183,7 @@ if ((!empty($moveupcat) or !empty($movedowncat)) and confirm_sesskey()) {
     if ($swapcategory and $movecategory) {
         $DB->set_field('course_categories', 'sortorder', $swapcategory->sortorder, array('id' => $movecategory->id));
         $DB->set_field('course_categories', 'sortorder', $movecategory->sortorder, array('id' => $swapcategory->id));
+        cache_helper::purge_by_event('changesincoursecat');
         add_to_log(SITEID, "category", "move", "editcategory.php?id=$movecategory->id", $movecategory->id);
     }