Problem buildworlding RELENG_5

I've cvsuped RELENG_5 src this morning and it fails when I try to 
buildworld. I get this error:

===> sys/modules/ip6fw
_at_ -> /usr/src/sys
machine -> /usr/src/sys/i386/include
rm -f .depend
mkdep -f .depend -a   -nostdinc -DIPV6FIREWALL -D_KERNEL -DKLD_MODULE 
-I- -I. -I_at_ -I_at_/contrib/altq -I_at_/../include 
-I/usr/obj/usr/src/i386/usr/include 
/usr/src/sys/modules/ip6fw/../../netinet6/ip6_fw.c
===> sys/modules/ipfilter
_at_ -> /usr/src/sys
machine -> /usr/src/sys/i386/include
rm -f .depend
mkdep -f .depend -a   -nostdinc -DUSE_INET6 
-I/usr/src/sys/modules/ipfilter/../../contrib/ipfilter -DIPFILTER=1 
-DIPFILTER_LKM -DIPFILTER_LOG -DPFIL_HOOKS -D_KERNEL -DKLD_MODULE -I- 
-I/usr/src/sys/modules/ipfilter/../../contrib/ipfilter -I. -I_at_ 
-I_at_/contrib/altq -I_at_/../include -I/usr/obj/usr/src/i386/usr/include 
/usr/src/sys/modules/ipfilter/../../contrib/ipfilter/netinet/mlfk_ipl.c 
/usr/src/sys/modules/ipfilter/../../contrib/ipfilter/netinet/ip_nat.c 
/usr/src/sys/modules/ipfilter/../../contrib/ipfilter/netinet/ip_frag.c 
/usr/src/sys/modules/ipfilter/../../contrib/ipfilter/netinet/ip_state.c 
/usr/src/sys/modules/ipfilter/../../contrib/ipfilter/netinet/ip_proxy.c 
/usr/src/sys/modules/ipfilter/../../contrib/ipfilter/netinet/ip_auth.c 
/usr/src/sys/modules/ipfilter/../../contrib/ipfilter/netinet/ip_log.c 
/usr/src/sys/modules/ipfilter/../../contrib/ipfilter/netinet/ip_fil.c 
/usr/src/sys/modules/ipfilter/../../contrib/ipfilter/netinet/fil.c
===> sys/modules/ipfw
_at_ -> /usr/src/sys
machine -> /usr/src/sys/i386/include
rm -f .depend
mkdep -f .depend -a   -nostdinc -DIPFIREWALL -D_KERNEL -DKLD_MODULE -I- 
-I. -I_at_ -I_at_/contrib/altq -I_at_/../include 
-I/usr/obj/usr/src/i386/usr/include 
/usr/src/sys/modules/ipfw/../../netinet/ip_fw2.c 
/usr/src/sys/modules/ipfw/../../netinet/ip_fw_pfil.c
/usr/src/sys/modules/ipfw/../../netinet/ip_fw2.c:35:22: opt_ipfw.h: No 
such file or directory
/usr/src/sys/modules/ipfw/../../netinet/ip_fw2.c:36:22: opt_ipdn.h: No 
such file or directory
/usr/src/sys/modules/ipfw/../../netinet/ip_fw2.c:37:26: opt_ipdivert.h: 
No such file or directory
/usr/src/sys/modules/ipfw/../../netinet/ip_fw2.c:38:22: opt_inet.h: No 
such file or directory
/usr/src/sys/modules/ipfw/../../netinet/ip_fw2.c:39:23: opt_ipsec.h: No 
such file or directory
/usr/src/sys/modules/ipfw/../../netinet/ip_fw2.c:41:2: #error IPFIREWALL 
requires INET.
/usr/src/sys/modules/ipfw/../../netinet/ip_fw_pfil.c:29:22: opt_ipfw.h: 
No such file or directory
/usr/src/sys/modules/ipfw/../../netinet/ip_fw_pfil.c:30:22: opt_ipdn.h: 
No such file or directory
/usr/src/sys/modules/ipfw/../../netinet/ip_fw_pfil.c:31:26: 
opt_ipdivert.h: No such file or directory
/usr/src/sys/modules/ipfw/../../netinet/ip_fw_pfil.c:32:28: 
opt_pfil_hooks.h: No such file or directory
/usr/src/sys/modules/ipfw/../../netinet/ip_fw_pfil.c:33:22: opt_inet.h: 
No such file or directory
/usr/src/sys/modules/ipfw/../../netinet/ip_fw_pfil.c:35:2: #error 
IPFIREWALL requires INET.
mkdep: compile failed
*** Error code 1

How can I fix it?

Thanks