Error with zaptel 1.4.1 make

Hi Gurus,
I am getting the following error during make of zaptel 1.4.1

/zaptel-1.4.1/ztdummy.c:89: error: storage size of `ztd_tlet’ isn’t known

I have the correct link to linux source etc /usr/src/linux
and have the module loaded CRC_CCITT
My kernel is 2.6.13

Can anyone help??

I’ve had the same problem. Any replies?