Asterisk fax

Hi ,

I m having problem to restart the asterisk after i successfully patch the makefile at apps. the error i get is below this.

[app_rxfax.so]Jan 25 11:07:18 WARNING[15076]: loader.c:325 __load_resource: /usr/lib/asterisk/modules/app_rxfax.so: undefined symbol: t30_get_far_ident

Plz advice.