diff --git a/core/modules/editor/editor.libraries.yml b/core/modules/editor/editor.libraries.yml
index 0103a42912fd..0aaa04bc476a 100644
--- a/core/modules/editor/editor.libraries.yml
+++ b/core/modules/editor/editor.libraries.yml
@@ -7,6 +7,7 @@ drupal.editor.admin:
     - core/once
     - core/jquery.once.bc
     - core/drupal
+    - core/underscore
 
 drupal.editor:
   version: VERSION