diff --git a/grade/grading/form/guide/classes/privacy/provider.php b/grade/grading/form/guide/classes/privacy/provider.php
index b7908c93e7a..98653475a6d 100644
--- a/grade/grading/form/guide/classes/privacy/provider.php
+++ b/grade/grading/form/guide/classes/privacy/provider.php
@@ -37,6 +37,7 @@ use \core_privacy\local\request\writer;
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class provider implements
+        \core_privacy\local\metadata\provider,
         \core_privacy\local\request\user_preference_provider {
 
     /**