diff --git a/enrol/lti/classes/local/ltiadvantage/task/sync_grades.php b/enrol/lti/classes/local/ltiadvantage/task/sync_grades.php
index f9d3735ed1f..d2ecd53a694 100644
--- a/enrol/lti/classes/local/ltiadvantage/task/sync_grades.php
+++ b/enrol/lti/classes/local/ltiadvantage/task/sync_grades.php
@@ -231,7 +231,7 @@ class sync_grades extends scheduled_task {
                                 JOIN {enrol} e
                                   ON (e.id = t.enrolid)
                                 JOIN {course} c
-                                  ON {c.id} = e.courseid
+                                  ON (c.id = e.courseid)
                                WHERE t.id = :resourceid";
             $coursename = $DB->get_field_sql($coursenamesql, ['resourceid' => $resource->id]);
             $resourcename = format_string($coursename, true, ['context' => $context->id]);