diff --git a/lisp/obsolete/spell.el b/lisp/obsolete/spell.el
index a97a6dce526..3acfcde643c 100644
--- a/lisp/obsolete/spell.el
+++ b/lisp/obsolete/spell.el
@@ -4,7 +4,7 @@
 
 ;; Maintainer: FSF
 ;; Keywords: wp, unix
-;; Obsolete-since: 23.1
+;; Obsolete-since: 24.1
 
 ;; This file is part of GNU Emacs.