diff --git a/lisp/cus-edit.el b/lisp/cus-edit.el
index 64b2c7b857b..d62976a8d37 100644
--- a/lisp/cus-edit.el
+++ b/lisp/cus-edit.el
@@ -432,6 +432,7 @@
   "DEL"     #'scroll-down-command
   "C-c C-c" #'Custom-set
   "C-x C-s" #'Custom-save
+  "C-c C-k" #'Custom-reset-standard
   "q"       #'Custom-buffer-done
   "u"       #'Custom-goto-parent
   "n"       #'widget-forward