tty_ithd' undeclared

exceeding current i386

===> cx (all)
cc -O -pipe -march=pentiumpro -Werror -D_KERNEL -DKLD_MODULE -nostdinc -I-   -DHAVE_KERNEL_OPTION_HEADERS -include /usr/obj/usr/src/sys/ROAM/opt_global.h -I. -I_at_ -I_at_/contrib/altq -I_at_/../include -finline-limit=8000 -fno-common -g -I/usr/obj/usr/src/sys/ROAM -mno-align-long-strings -mpreferred-stack-boundary=2  -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -ffreestanding -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -fformat-extensions -std=c99 -c /usr/src/sys/modules/cx/../../dev/cx/if_cx.c
/usr/src/sys/modules/cx/../../dev/cx/if_cx.c: In function `cx_modevent':
/usr/src/sys/modules/cx/../../dev/cx/if_cx.c:2550: error: `tty_ithd' undeclared (first use in this function)
/usr/src/sys/modules/cx/../../dev/cx/if_cx.c:2550: error: (Each undeclared identifier is reported only once
/usr/src/sys/modules/cx/../../dev/cx/if_cx.c:2550: error: for each function it appears in.)
/usr/src/sys/modules/cx/../../dev/cx/if_cx.c:2563: warning: implicit declaration of function `ithread_remove_handler'
/usr/src/sys/modules/cx/../../dev/cx/if_cx.c:2563: warning: nested extern declaration of `ithread_remove_handler'
*** Error code 1