diff --git a/zebra/zserv.c b/zebra/zserv.c
index 17e7888..f08f7ce 100644
--- a/zebra/zserv.c
+++ b/zebra/zserv.c
@@ -1729,7 +1729,7 @@
 
 /* Initialisation of zebra and installation of commands. */
 void
-zebra_init ()
+zebra_init (void)
 {
   /* Client list init. */
   zebrad.client_list = list_new ();