Hello! It looks like acl.h in version 0.14 is broken. It needs to have the following lines added: #ifndef HAVE_KRB_PRINCIPAL #include <stds.h> #endif Otherwise, compilation bombs out with: acl_files.c: In function `acl_canonicalize_principal': acl_files.c:85: `krb_principal' undeclared (first use this function) Max