diff --git a/src/libmsc/gsm_04_80.c b/src/libmsc/gsm_04_80.c
index 119f0e1..502848f 100644
--- a/src/libmsc/gsm_04_80.c
+++ b/src/libmsc/gsm_04_80.c
@@ -78,9 +78,10 @@
 	return msc_tx_dtap(conn, msg);
 }
 
-int msc_send_ussd_release_complete(struct ran_conn *conn)
+int msc_send_ussd_release_complete(struct ran_conn *conn,
+				   uint8_t transaction_id)
 {
-	struct msgb *msg = gsm0480_create_ussd_release_complete();
+	struct msgb *msg = gsm0480_create_release_complete(transaction_id);
 	if (!msg)
 		return -1;
 	return msc_tx_dtap(conn, msg);
diff --git a/src/libmsc/msc_vty.c b/src/libmsc/msc_vty.c
index e1019a2..078b83a 100644
--- a/src/libmsc/msc_vty.c
+++ b/src/libmsc/msc_vty.c
@@ -1149,7 +1149,9 @@
 	}
 
 	msc_send_ussd_notify(conn, level, text);
-	msc_send_ussd_release_complete(conn);
+	/* FIXME: since we don't allocate a transaction here,
+	 * we use dummy GSM 04.07 transaction ID. */
+	msc_send_ussd_release_complete(conn, 0x00);
 
 	vlr_subscr_put(vsub);
 	talloc_free(text);