(executable-chmod): Fix customize type.

diff --git a/lisp/progmodes/executable.el b/lisp/progmodes/executable.el
index a8734d965de3feccc1dc90c988fc31986690c84c..454090d508b7af64e72b980de07041fc2e1f045b 100644 (file)
--- a/lisp/progmodes/executable.el
+++ b/lisp/progmodes/executable.el
@@ -95,7 +95,8 @@ When this is `function', only ask when called non-interactively."
 This mode passed to `set-file-modes' is taken absolutely when negative, or
 relative to the files existing modes.  Do nothing if this is nil.
 Typical values are 73 (+x) or -493 (rwxr-xr-x)."
-  :type 'integer
+  :type '(choice integer
+                (const nil))
   :group 'executable)