* message.el (message-tab-body-function): Fixed mismatched custom

[gnus] / lisp / gnus.el

diff --git a/lisp/gnus.el b/lisp/gnus.el
index a55abcc..44c86b3 100644 (file)
--- a/lisp/gnus.el
+++ b/lisp/gnus.el
@@ -2387,7 +2387,8 @@ following hook:
   "Function run when a group level is changed.
 It is called with three parameters -- GROUP, LEVEL and OLDLEVEL."
   :group 'gnus-group-levels
-  :type 'function)
+  :type '(choice (const nil)
+                function))
 
 ;;; Face thingies.