diff --git a/lisp/progmodes/dcl-mode.el b/lisp/progmodes/dcl-mode.el
index a06818d06b4..bac8c7d144c 100644
--- a/lisp/progmodes/dcl-mode.el
+++ b/lisp/progmodes/dcl-mode.el
@@ -71,7 +71,7 @@
 
 ;;; *** Customization *****************************************************
 
-(defcustom dcl nil
+(defgroup dcl nil
   "Major mode for editing DCL command files."
   :group 'languages)