kernel with ndis support

I want to compile kernel with ndis support to use it for wireless. I've inserted only these 2 lines in GENERIC:
options         NDISAPI
device          ndis

but I see this error:

:> hack.c
cc -shared -nostdlib hack.c -o hack.So
rm -f hack.c
MAKE=make sh ../../../conf/newvers.sh GENERIC
cc -c -O -pipe  -std=c99 -g -Wall -Wredundant-decls -Wnested-externs -Wstrict-pr
ototypes  -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -Wundef -Wn
o-pointer-sign -fformat-extensions -nostdinc  -I. -I../../.. -I../../../contrib/
altq -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -fno-common -f
inline-limit=8000 --param inline-unit-growth=100 --param large-function-growth=1
000  -mno-align-long-strings -mpreferred-stack-boundary=2  -mno-mmx -mno-3dnow -
mno-sse -mno-sse2 -mno-sse3 -ffreestanding -fstack-protector -Werror  vers.c
linking kernel.debug
if_ndis.o(.text+0x179f): In function `ndis_detach':
../../../dev/if_ndis/if_ndis.c:1080: undefined reference to `ndis_free_amem'
if_ndis.o(.text+0x196c): In function `ndis_attach':
../../../dev/if_ndis/if_ndis.c:565: undefined reference to `ndis_alloc_amem'
*** Error code 1

ibb# uname -a
FreeBSD ibb.bsdsys-bg.com 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Tue Jun 16 04:54:1
8 EEST 2009     root_at_ibb.bsdsys-bg.com:/usr/obj/usr/src/sys/GENERIC  i386