; * lisp/doc-view.el (doc-view-djvused-program): allow nil in type

(cherry picked from commit 336e977f18f0f823af229e037f0df71505366839)

diff --git a/lisp/doc-view.el b/lisp/doc-view.el
index 28d48a74f1ef219e1fca0eafdf5336205b3589c4..997d0972dcf14b3b6f55f5171eac86acf2e99dd9 100644 (file)
--- a/lisp/doc-view.el
+++ b/lisp/doc-view.el
@@ -222,7 +222,7 @@ are available (see Info node `(emacs)Document View')."
                                          "djvused")
   "Name of \"djvused\" program to generate imenu outline for DjVu files.
 This is part of DjVuLibre."
-  :type 'file
+  :type '(choice (const nil) file)
   :version "31.1")
 
 (defcustom doc-view-imenu-enabled (and (or (executable-find "mutool")