diff --git a/enrol/lti/jwks.php b/enrol/lti/jwks.php
index a3ec29e7e44..d0ae35b95ff 100644
--- a/enrol/lti/jwks.php
+++ b/enrol/lti/jwks.php
@@ -34,4 +34,4 @@ $key = get_config('enrol_lti', 'lti_13_kid');
 $keyendpoint = JwksEndpoint::new([$key => $privatekey]);
 
 @header('Content-Type: application/json; charset=utf-8');
-$keyendpoint->outputJwks();
+echo json_encode($keyendpoint->getPublicJwks());