Index: tests/sys/netinet/libalias/util.c
===================================================================
--- tests/sys/netinet/libalias/util.c
+++ tests/sys/netinet/libalias/util.c
@@ -109,8 +109,8 @@
 
 struct udphdr *
 set_udp(struct ip *p, u_short sport, u_short dport) {
-	uint32_t *up = (void *)p;
-	struct udphdr *u = (void *)&(up[p->ip_hl]);
+	char *up = (void *)p;
+	struct udphdr *u = (void *)&(up[4*p->ip_hl]);
 	int payload = ntohs(p->ip_len) - 4*p->ip_hl;
 
 	REQUIRE(payload >= (int)sizeof(*u));