unknown option IPV6FIREWALL_VERBOSE when compiling

[nickhardcore]

Hi list.
I was following this guide
(http://www.freebsd.org/doc/en/books/handbook/firewalls-ipfw.html)  to
configure and use IPFW on my FreeBSD 7 (is a vmware virtual machine but
I don't think this is a problem)

[root at hyperion /usr/src]$ uname -a
FreeBSD hyperion.xxx.org 7.0-RELEASE-p2 FreeBSD 7.0-RELEASE-p2 #1: Wed
Jul  2 19:48:58 CEST 2008
root at hyperion.xxx.org:/usr/obj/usr/src/sys/CUSTOM  i386

But when compiling the kernel I have the following error:

[root at hyperion /usr/src]# make buildkernel KERNCONF=CUSTOM
--------------------------------------------------------------
>>> Kernel build for CUSTOM started on Thu Jul 10 23:21:45 CEST 2008
--------------------------------------------------------------
===> CUSTOM
mkdir -p /usr/obj/usr/src/sys
--------------------------------------------------------------
>>> stage 1: configuring the kernel
--------------------------------------------------------------
cd /usr/src/sys/i386/conf;
PATH=/usr/obj/usr/src/tmp/legacy/usr/sbin:/usr/obj/usr/src/tmp/legacy/usr/bin:/usr/obj/usr/src/tmp/legacy/usr/games:/usr/obj/usr/src/tmp/usr/sbin:/usr/obj/usr/src/tmp/usr/bin:/usr/obj/usr/src/tmp/usr/games:/sbin:/bin:/usr/sbin:/usr/bin
 config  -d /usr/obj/usr/src/sys/CUSTOM  /usr/src/sys/i386/conf/CUSTOM
/usr/src/sys/i386/conf/CUSTOM: unknown option "IPV6FIREWALL_VERBOSE"
*** Error code 1
Stop in /usr/src.
*** Error code 1
Stop in /usr/src.

The kernel configuration is a "GENERIC" with this few customizations:

options         ACCEPT_FILTER_HTTP
options         ACCEPT_FILTER_DATA
options         DEVICE_POLLING
options         IPFIREWALL
options         IPFIREWALL_VERBOSE
options         IPFIREWALL_DEFAULT_TO_ACCEPT
options         IPV6FIREWALL
options         IPV6FIREWALL_VERBOSE
options         IPV6FIREWALL_DEFAULT_TO_ACCEPT
options         IPDIVERT

I tried to update through cvsup the system and then recompile the kernel
with the new options but the error is still there.
Any idea?

    nick