diff --git a/sys/netinet/in.c b/sys/netinet/in.c
index 569b5c529b3a..4e7f4b133459 100644
--- a/sys/netinet/in.c
+++ b/sys/netinet/in.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: in.c,v 1.179 2016/09/01 04:27:00 ozaki-r Exp $	*/
+/*	$NetBSD: in.c,v 1.180 2016/09/13 15:41:33 christos Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -91,7 +91,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: in.c,v 1.179 2016/09/01 04:27:00 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: in.c,v 1.180 2016/09/13 15:41:33 christos Exp $");
 
 #include "arp.h"
 
@@ -1065,6 +1065,7 @@ in_ifinit(struct ifnet *ifp, struct in_ifaddr *ia,
 	 */
 	oldaddr = ia->ia_addr;
 	ia->ia_addr = *sin;
+	ia->ia4_flags = 0;
 
 	/* Set IN_IFF flags early for if_addr_init() */
 	if (hostIsNew && if_do_dad(ifp) && !in_nullhost(ia->ia_addr.sin_addr)) {
diff --git a/sys/netinet6/in6.c b/sys/netinet6/in6.c
index 21f364e9df6a..e7fbea6976d1 100644
--- a/sys/netinet6/in6.c
+++ b/sys/netinet6/in6.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: in6.c,v 1.218 2016/09/02 15:57:54 roy Exp $	*/
+/*	$NetBSD: in6.c,v 1.219 2016/09/13 15:41:34 christos Exp $	*/
 /*	$KAME: in6.c,v 1.198 2001/07/18 09:12:38 itojun Exp $	*/
 
 /*
@@ -62,7 +62,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: in6.c,v 1.218 2016/09/02 15:57:54 roy Exp $");
+__KERNEL_RCSID(0, "$NetBSD: in6.c,v 1.219 2016/09/13 15:41:34 christos Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -1708,6 +1708,7 @@ in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia,
 	}
 
 	ia->ia_addr = *sin6;
+	ia->ia6_flags = 0;
 
 	if (ifacount <= 0 &&
 	    (error = if_addr_init(ifp, &ia->ia_ifa, true)) != 0) {