* lisp/gnus/smime.el (smime-openssl-program): Allow nil value.

diff --git a/lisp/gnus/smime.el b/lisp/gnus/smime.el
index 5500148e518e472dc330462a45b08f43e9885e71..eb27fee88ce8f62958843a3344e97e9b0375180d 100644 (file)
--- a/lisp/gnus/smime.el
+++ b/lisp/gnus/smime.el
@@ -174,8 +174,9 @@ and the files themselves should be in PEM format."
           (eq 0 (call-process "openssl" nil nil nil "version"))
         (error nil))
        "openssl")
-  "Name of OpenSSL binary."
-  :type 'string
+  "Name of OpenSSL binary or nil if none."
+  :type '(choice string
+                 (const :tag "none" nil))
   :group 'smime)
 
 ;; OpenSSL option to select the encryption cipher