diff --git a/kame/sys/netinet6/ip6_forward.c b/kame/sys/netinet6/ip6_forward.c
index 9474df2acc..fa3c1d8373 100644
--- a/kame/sys/netinet6/ip6_forward.c
+++ b/kame/sys/netinet6/ip6_forward.c
@@ -1,4 +1,4 @@
-/*	$KAME: ip6_forward.c,v 1.56 2000/09/22 04:01:37 itojun Exp $	*/
+/*	$KAME: ip6_forward.c,v 1.57 2000/10/05 03:34:51 itojun Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -58,6 +58,8 @@
 
 #include <netinet/in.h>
 #include <netinet/in_var.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
 #include <netinet/ip_var.h>
 #include <netinet/ip6.h>
 #include <netinet6/ip6_var.h>