diff --git a/asterisk/SIP_ConnectionHandler.ttcn b/asterisk/SIP_ConnectionHandler.ttcn
index cd50be6..05f872f 100644
--- a/asterisk/SIP_ConnectionHandler.ttcn
+++ b/asterisk/SIP_ConnectionHandler.ttcn
@@ -90,6 +90,8 @@
 	charstring local_rtp_addr,
 	uint16_t local_rtp_port,
 
+	/* Whether to expect Asterisk to re-INVITE to make RTP flow directly to peer. */
+	boolean exp_update_to_direct_rtp,
 	SDP_Message peer_sdp optional,
 	CallParsMT mt
 }
@@ -107,6 +109,7 @@
 	sip_body := omit,
 	local_rtp_addr := local_rtp_addr,
 	local_rtp_port := local_rtp_port,
+	exp_update_to_direct_rtp := true,
 	peer_sdp := omit,
 	mt := t_CallParsMT
 }