diff --git a/plugins/dialog/samples/assets/my_dialog.js b/plugins/dialog/samples/assets/my_dialog.js
index d29868a8b15..b69b57f4b36 100644
--- a/plugins/dialog/samples/assets/my_dialog.js
+++ b/plugins/dialog/samples/assets/my_dialog.js
@@ -45,3 +45,5 @@ CKEDITOR.dialog.add( 'myDialog', function( editor ) {
 		]
 	};
 });
+
+// %LEAVE_UNMINIFIED% %REMOVE_LINE%
\ No newline at end of file