Question about multipath patch for FreeBSD

[hugle]

Hello all.
I've just patched my kernel with option MULTIPATH
http://www.dsm.fordham.edu/~tanzer/multipath/mpath-48S.tgz

patch -p0 < /usr/src/mpath/mpath-diff-sys
patch -p0 < /usr/src/mpath/mpath-diff-route
patch -p0 < /usr/src/mpath/mpath-diff-netstat
patch -p0 < /usr/src/mpath/mpath-diff-man

#here made a backup of files ;)
cp /usr/include/net/route.h /home/hugle/multipath/route.h
cp /usr/include/net/if_var.h /home/hugle/multipath/if_var.h

cp /usr/src/sys/net/route.h /usr/include/net/route.h
cp /usr/src/sys/net/if_var.h /usr/include/net/if_var.h

did config
make depend

and while doing make
i get this error:
cast-qual  -fformat-extensions -ansi  -nostdinc -I- -I. -I../.. -I../../../include -I../../contrib/dev/acpica -I../../contrib/ipfilter  -D_KERNEL -include opt_global.h  -mpreferred-stack-boundary=2  ../../netinet/if_ether.c
../../netinet/if_ether.c: In function `arplookup':
../../netinet/if_ether.c:923: too few arguments to function `rtrequest'
*** Error code 1

Stop in /usr/src/sys/compile/MULTIPATH.

can someone help me?
I've cvsupeed with RELENG_4 today on 2004-4-09
-- 
Best regards,Hugle