diff --git a/include/osmocom/netif/osmux.h b/include/osmocom/netif/osmux.h
index ed5c1ab..ff537c0 100644
--- a/include/osmocom/netif/osmux.h
+++ b/include/osmocom/netif/osmux.h
@@ -13,6 +13,8 @@
  *  Osmocom multiplex protocol helpers
  */
 
+#define OSMUX_DEFAULT_PORT 1984
+
 /* OSmux header:
  *
  *	rtp_m (1 bit):		RTP M field (RFC3550, RFC4867)