Error compiling asterisk 1.6 (T38 module)

[CC] app_fax.c -> app_fax.o
app_fax.c: In function ‘transmit_audio’:
app_fax.c:312: error: storage size of ‘fax’ isn’t known
app_fax.c:312: warning: unused variable 'fax’
app_fax.c: In function ‘transmit_t38’:
app_fax.c:483: error: storage size of ‘t38’ isn’t known
app_fax.c:483: warning: unused variable 't38’
make[1]: *** [app_fax.o] Error 1
make: *** [apps] Error 2

I could install spandsp-0.0.6pre2.tgz

please help

thank you

wrong spansp version!

response in : voip-info.org/wiki/view/Asterisk%20T.38