diff --git a/Classes/XClass/Form/FormEditorController.php b/Classes/XClass/Form/FormEditorController.php
index d32738499106f26dc3bc9156c6fdd7b14368b5d8..ad178e6ce9912fe4369a51021a0531671500526c 100644
--- a/Classes/XClass/Form/FormEditorController.php
+++ b/Classes/XClass/Form/FormEditorController.php
@@ -170,7 +170,7 @@ class FormEditorController extends \TYPO3\CMS\Form\Controller\FormEditorControll
 			}
 
 			$markers[] = [
-				'marker' => $markerName,
+				'identifier' => $markerName,
 				'type' => MailTemplateService::MARKER_TYPE_STRING,
 				'value' => $element['label'],
 				'description' => $element['label']