Have error

authorize.c:153: error: conflicting types for 'find_credentials'
authorize.h:49: error: previous declaration of 'find_credentials' was here
authorize.c:153: error: conflicting types for 'find_credentials'
authorize.h:49: error: previous declaration of 'find_credentials' was here
make[1]: *** [authorize.o] Error 1
make[1]: Leaving directory `/soft/kamailio-3.0.0-rc3/modules_k/auth_diameter'
make: *** [modules_k] Error 1

i use
centos 4.5
make version 8.1
gcc version 3.4.6 20060404 (Red Hat 3.4.6-8)
Thanks.