diff --git a/sys/netinet6/in6.h b/sys/netinet6/in6.h
index ef4231098973..10bc1f91c554 100644
--- a/sys/netinet6/in6.h
+++ b/sys/netinet6/in6.h
@@ -103,7 +103,7 @@ struct in6_addr {
 };
 
 #define s6_addr   __u6_addr.__u6_addr8
-#ifdef _KERNEL	/* XXX nonstandard */
+#if defined(_KERNEL) || defined(_STANDALONE) /* XXX nonstandard */
 #define s6_addr8  __u6_addr.__u6_addr8
 #define s6_addr16 __u6_addr.__u6_addr16
 #define s6_addr32 __u6_addr.__u6_addr32