diff --git a/dhcpv6.c b/dhcpv6.c
index f2e7307..0523bba 100644
--- a/dhcpv6.c
+++ b/dhcpv6.c
@@ -423,11 +423,11 @@ search:
 int dhcpv6(struct ctx *c, const struct pool *p,
 	   const struct in6_addr *saddr, const struct in6_addr *daddr)
 {
-	struct opt_hdr *ia, *bad_ia, *client_id;
-	const struct opt_hdr *server_id;
+	const struct opt_hdr *client_id, *server_id, *ia;
 	const struct in6_addr *src;
 	const struct msg_hdr *mh;
 	const struct udphdr *uh;
+	struct opt_hdr *bad_ia;
 	size_t mlen, n;
 
 	uh = packet_get(p, 0, 0, sizeof(*uh), &mlen);