r250633: make -j buildkernel: ports module: illegal option -- J

amd64 r250633 buildworld fine,
but on "make -j4 buildkernel" got this error:

===> Ports module net/bwn-firmware-kmod (all)

*skip*

Extracting v4/b0g0initvals5.fw
/usr/bin/touch /usr/obj/usr/src/sys/BUZI/usr/ports/net/bwn-firmware-kmod/work/bg
/v4/ucode.fw
make: illegal option -- J
usage: make [-BPSXeiknpqrstv] [-C directory] [-D variable]
        [-d flags] [-E variable] [-f makefile] [-I directory]
        [-j max_jobs] [-m directory] [-V variable]
        [variable=value] [target ...]
*** Error code 2

Stop.
make: stopped in /usr/ports/net/bwn-firmware-kmod

#  cat /etc/src.conf
PORTS_MODULES=net/bwn-firmware-kmod

Thanks

Anton