diff --git a/lisp/international/mule-cmds.el b/lisp/international/mule-cmds.el
index 0904ff93e23..690ea6f7533 100644
--- a/lisp/international/mule-cmds.el
+++ b/lisp/international/mule-cmds.el
@@ -35,8 +35,6 @@
 (defvar dos-codepage)
 (autoload 'widget-value "wid-edit")
 
-(defvar mac-system-coding-system)
-
 ;;; MULE related key bindings and menus.
 
 (defvar mule-keymap