@deftypefun {int} {gnutls_certificate_allocate_credentials} (gnutls_certificate_credentials_t * @var{res})
-@var{res}: is a pointer to a @code{gnutls_certificate_credentials_t} type.
+@var{res}: is a pointer to a @code{gnutls_certificate_credentials_t} structure.
This structure is complex enough to manipulate directly thus this
helper function is provided in order to allocate it.