asterisk users - Aug 2004 - has no CRC! error messages while compiling zaptel

I get this warnings while compiling zaptel
Any suggestions would be very helpfull.

make -C /usr/src/linux-2.6 SUBDIRS=/usr/src/bri-stuff.0.1.0-RC4/zaptel
modules
make[1]: Entering directory `/usr/src/linux-2.6.8.1'
  CC [M]  /usr/src/bri-stuff.0.1.0-RC4/zaptel/zaptel.o
/usr/src/bri-stuff.0.1.0-RC4/zaptel/zaptel.c:163: warning: `fcstab' defined
but not used
  CC [M]  /usr/src/bri-stuff.0.1.0-RC4/zaptel/tor2.o
  CC [M]  /usr/src/bri-stuff.0.1.0-RC4/zaptel/torisa.o
/usr/src/bri-stuff.0.1.0-RC4/zaptel/torisa.c:1139: warning: `set_tor_base'
defined but not used
  CC [M]  /usr/src/bri-stuff.0.1.0-RC4/zaptel/wcusb.o
  CC [M]  /usr/src/bri-stuff.0.1.0-RC4/zaptel/wcfxo.o
  CC [M]  /usr/src/bri-stuff.0.1.0-RC4/zaptel/wcfxs.o
  CC [M]  /usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdynamic.o
  CC [M]  /usr/src/bri-stuff.0.1.0-RC4/zaptel/ztd-eth.o
  CC [M]  /usr/src/bri-stuff.0.1.0-RC4/zaptel/wct1xxp.o
  CC [M]  /usr/src/bri-stuff.0.1.0-RC4/zaptel/wct4xxp.o
  CC [M]  /usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdummy.o
  Building modules, stage 2.
  MODPOST
*** Warning: "zt_register"
[/usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdynamic.ko] has no CRC!
*** Warning: "zt_transmit"
[/usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdynamic.ko] has no CRC!
*** Warning: "zt_receive"
[/usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdynamic.ko]
has no CRC!
*** Warning: "zt_ec_chunk"
[/usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdynamic.ko] has no CRC!
*** Warning: "zt_set_dynamic_ioctl"
[/usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdynamic.ko] has no CRC!
*** Warning: "zt_unregister"
[/usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdynamic.ko] has no CRC!
*** Warning: "zt_alarm_notify"
[/usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdynamic.ko] has no CRC!
*** Warning: "zt_rbsbits"
[/usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdynamic.ko]
has no CRC!
*** Warning: "zt_transmit"
[/usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdummy.ko]
has no CRC!
*** Warning: "zt_receive"
[/usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdummy.ko]
has no CRC!
*** Warning: "zt_unregister"
[/usr/src/bri-stuff.0.1.0-RC4/zaptel/ztdummy.ko] has no CRC!