diff --git a/library/IPA_Emulation.ttcn b/library/IPA_Emulation.ttcn
index ed51110..57edb00 100644
--- a/library/IPA_Emulation.ttcn
+++ b/library/IPA_Emulation.ttcn
@@ -19,6 +19,7 @@
 
 type record ASP_IPA_Unitdata {
 	IpaStreamId	streamId,
+	IpaStreamIdExt	streamIdExt optional,
 	octetstring	payload
 }
 
@@ -105,6 +106,7 @@
 	var IPA_Send ipa_tx := {
 		connId := g_ipa_conn_id,
 		streamId := IPAC_PROTO_CCM,
+		streamIdExt := omit,
 		msg := enc_PDU_IPA_CCM(ccm)
 	}
 	log("CCM Tx:", ccm);
@@ -151,6 +153,7 @@
 private function f_to_asp(IPA_RecvFrom ipa_rx) return ASP_IPA_Unitdata {
 	var ASP_IPA_Unitdata ret := {
 		streamId := ipa_rx.streamId,
+		streamIdExt := ipa_rx.streamIdExt,
 		payload := ipa_rx.msg
 	}
 	return ret;
@@ -160,6 +163,7 @@
 	var IPA_Send ret := {
 		connId := connId,
 		streamId := ipa_tx.streamId,
+		streamIdExt := ipa_tx.streamIdExt,
 		msg := ipa_tx.payload
 	}
 	return ret;