diff --git a/bsc-nat/MSC_ConnectionHandler.ttcn b/bsc-nat/MSC_ConnectionHandler.ttcn
index 89728b4..c8cb005 100644
--- a/bsc-nat/MSC_ConnectionHandler.ttcn
+++ b/bsc-nat/MSC_ConnectionHandler.ttcn
@@ -69,6 +69,7 @@
 	decode_dtap := false,
 	role_ms := false,
 	protocol := RAN_PROTOCOL_BSSAP,
+	transport := BSSAP_TRANSPORT_AoIP,
 	use_osmux := false,
 	sccp_addr_local := omit,
 	sccp_addr_peer := omit