diff --git a/include/osmocom/mgcp/osmux.h b/include/osmocom/mgcp/osmux.h
index 58d9095..1da7c8b 100644
--- a/include/osmocom/mgcp/osmux.h
+++ b/include/osmocom/mgcp/osmux.h
@@ -14,6 +14,7 @@
 struct mgcp_conn_rtp;
 
 int osmux_init(int role, struct mgcp_trunk *trunk);
+int osmux_init_conn(struct mgcp_conn_rtp *conn);
 int osmux_enable_conn(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn,
 		      const struct osmo_sockaddr *addr);
 void conn_osmux_disable(struct mgcp_conn_rtp *conn);