diff --git a/include/osmocom/mgcp/osmux.h b/include/osmocom/mgcp/osmux.h
index f138901..62245a9 100644
--- a/include/osmocom/mgcp/osmux.h
+++ b/include/osmocom/mgcp/osmux.h
@@ -11,7 +11,7 @@
 
 int osmux_init(int role, struct mgcp_config *cfg);
 int osmux_enable_conn(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn,
-		      struct osmo_sockaddr *addr, uint16_t port);
+		      const struct osmo_sockaddr *addr);
 void conn_osmux_disable(struct mgcp_conn_rtp *conn);
 int conn_osmux_allocate_cid(struct mgcp_conn_rtp *conn, int osmux_cid);
 void conn_osmux_release_cid(struct mgcp_conn_rtp *conn);