asterisk users - Jul 2007 - Zaptel compiling broken: error: conflicting types for '__kernel_dev_t'

dear all,

when i complied the latest Zaptel-1.2.19 to upgrade my asterisk system,
it told me those errors:
cc -c -fPIC -DSTANDALONE_ZAPATA -DBUILDING_TONEZONE -DHOTPLUG_FIRMWARE
-I. -O4 -g -Wall -DBUILDING_TONEZONE -o zonedata.lo zonedata.c
In file included from zaptel.h:31,
from tonezone.h:27,
from zonedata.c:26:
/usr/include/linux/types.h:18: error: conflicting types for
'__kernel_dev_t'
/usr/include/asm/posix_types.h:10: error: previous declaration of
'__kernel_dev_t' was here
/usr/include/linux/types.h:30: error: syntax error before "timer_t"
/usr/include/linux/types.h:31: error: syntax error before "clockid_t"
make: *** [zonedata.lo] Error 1

my environment:
CenOS 4.2, gcc-3.4.4-2, kernel-2.6.12.2

& my system is running asterisk-1.2.9.1+zaptel-1.2.6

can anyone give me some advise?
thanks a lot.

B/Rgz.