diff --git a/ip/ip6tunnel.c b/ip/ip6tunnel.c
index 8421983b..8852a67a 100644
--- a/ip/ip6tunnel.c
+++ b/ip/ip6tunnel.c
@@ -335,6 +335,7 @@ static int do_show(int argc, char **argv)
         struct ip6_tnl_parm p;
 
 	ip6_tnl_parm_init(&p, 0);
+	p.proto = 0;  /* default to any */
 
         if (parse_args(argc, argv, &p) < 0)
                 return -1;