(gnus-audio-directory): Fix :type.

diff --git a/lisp/gnus/gnus-audio.el b/lisp/gnus/gnus-audio.el
index b66339855accdb719d5659fb9ca024e7bb0be5e9..8906745cdfdd344eb59df5501d601ef2bc7e12a3 100644 (file)
--- a/lisp/gnus/gnus-audio.el
+++ b/lisp/gnus/gnus-audio.el
@@ -44,7 +44,7 @@
 
 (defcustom gnus-audio-directory (nnheader-find-etc-directory "sounds")
   "The directory containing the Sound Files."
-  :type 'directory
+  :type '(choice directory (const nil))
   :group 'gnus-audio)
 
 (defcustom gnus-audio-au-player "/usr/bin/showaudio"