diff --git a/src/Service/UwBlockAutoElements.php b/src/Service/UwBlockAutoElements.php
index 6676ad1f9decd661cc519f72dbe9ffdb7214a462..69cd2787b556eb611f193eec13fae3d8f2b0069d 100644
--- a/src/Service/UwBlockAutoElements.php
+++ b/src/Service/UwBlockAutoElements.php
@@ -712,7 +712,7 @@ class UwBlockAutoElements {
 
     // The number of publications to show form element.
     $form['publication_reference']['limit'] = $this->uwBlockService->getLimitPerBlockFormElement(
-      'publication reference',
+      'publication_reference',
       $config
     );