(rmail-edit-mode-hook): Add :version.

diff --git a/lisp/mail/rmailedit.el b/lisp/mail/rmailedit.el
index 066b6adfd4cbc06045d9dc13835e4ff5be93c218..17a83cf1eba54002f54848f7007351cb49071956 100644 (file)
--- a/lisp/mail/rmailedit.el
+++ b/lisp/mail/rmailedit.el
@@ -29,6 +29,7 @@
 (defcustom rmail-edit-mode-hook nil
   "List of functions to call when editing an RMAIL message."
   :type 'hook
+  :version "21.1"
   :group 'rmail-edit)
 
 (defvar rmail-old-text)