diff --git a/include/osmocom/trau/osmo_ortp.h b/include/osmocom/trau/osmo_ortp.h
index c02cca8..9512759 100644
--- a/include/osmocom/trau/osmo_ortp.h
+++ b/include/osmocom/trau/osmo_ortp.h
@@ -29,6 +29,7 @@
 
 /*! \brief Flag to indicate the socket is in polling-only mode */
 #define OSMO_RTP_F_POLL		0x0001
+#define OSMO_RTP_F_DISABLED	0x0002
 
 /*! \brief A structure representing one RTP socket */
 struct osmo_rtp_socket {