int
tls_client_start(int fd, host_item *host,
address_item *addr ARG_UNUSED,
- transport_instance *tb)
+ transport_instance *tb
+#ifdef EXPERIMENTAL_DANE
+ , dne_answer * unused_tlsa_dnsa
+#endif
+ )
{
smtp_transport_options_block *ob =
(smtp_transport_options_block *)tb->options_block;