diff --git a/lisp/cus-edit.el b/lisp/cus-edit.el
index 8d440be9b39..93b310fdb17 100644
--- a/lisp/cus-edit.el
+++ b/lisp/cus-edit.el
@@ -433,6 +433,10 @@
   "Input from the menus."
   :group 'environment)
 
+(defgroup dnd nil
+  "Handling data from drag and drop."
+  :group 'environment)
+
 (defgroup auto-save nil
   "Preventing accidential loss of data."
   :group 'files)