(whois-server-list): Fix customization type.

diff --git a/lisp/net-utils.el b/lisp/net-utils.el
index 32cdbf0d7427f5d8eb1668a73d31bee26dc4e30b..111d20f0239349c0d8385a5fc9ed943d5f10a36c 100644 (file)
--- a/lisp/net-utils.el
+++ b/lisp/net-utils.el
@@ -597,7 +597,7 @@ This list in not complete.")
     ("whois.ripe.net"))
   "A list of whois servers that can be queried."
   :group 'net-utils
-  :type '(repeat (list)))
+  :type '(repeat (list string)))
 
 (defcustom whois-server-tld
   '(("rs.internic.net" . "com")