diff --git a/typo3/sysext/backend/Classes/Controller/AbstractFormEngineAjaxController.php b/typo3/sysext/backend/Classes/Controller/AbstractFormEngineAjaxController.php
index 8135d762657b..e626dc7819f9 100644
--- a/typo3/sysext/backend/Classes/Controller/AbstractFormEngineAjaxController.php
+++ b/typo3/sysext/backend/Classes/Controller/AbstractFormEngineAjaxController.php
@@ -36,7 +36,7 @@ abstract class AbstractFormEngineAjaxController
      * @param array $result
      * @return array
      */
-    public function createExecutableStringRepresentationOfRegisteredRequireJsModules(array $result): array
+    protected function createExecutableStringRepresentationOfRegisteredRequireJsModules(array $result): array
     {
         if (empty($result['requireJsModules'])) {
             return [];