diff --git a/sys/netinet/ip_output.c b/sys/netinet/ip_output.c
index de794fc6ccf4..9df2bc23c406 100644
--- a/sys/netinet/ip_output.c
+++ b/sys/netinet/ip_output.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ip_output.c,v 1.172 2007/01/04 19:07:03 elad Exp $	*/
+/*	$NetBSD: ip_output.c,v 1.173 2007/01/08 04:14:54 yamt Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -98,7 +98,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ip_output.c,v 1.172 2007/01/04 19:07:03 elad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ip_output.c,v 1.173 2007/01/08 04:14:54 yamt Exp $");
 
 #include "opt_pfil_hooks.h"
 #include "opt_inet.h"
@@ -820,6 +820,7 @@ spd_done:
 
 	ip = mtod(m, struct ip *);
 	hlen = ip->ip_hl << 2;
+	ip_len = ntohs(ip->ip_len);
 #endif /* PFIL_HOOKS */
 
 	m->m_pkthdr.csum_data |= hlen << 16;