diff --git a/lisp/diff.el b/lisp/diff.el
index ea63a2a28ea..f181873384b 100644
--- a/lisp/diff.el
+++ b/lisp/diff.el
@@ -31,7 +31,6 @@
 
 (require 'compile)
 
-;;;###autoload
 (defgroup diff nil
   "Comparing files with `diff'."
   :group 'tools)