diff --git a/include/osmocom/msc/gsm_04_80.h b/include/osmocom/msc/gsm_04_80.h
index 29b800bad..073794b06 100644
--- a/include/osmocom/msc/gsm_04_80.h
+++ b/include/osmocom/msc/gsm_04_80.h
@@ -10,4 +10,5 @@ int msc_send_ussd_reject(struct ran_conn *conn,
 
 int msc_send_ussd_notify(struct ran_conn *conn, int level,
 			 const char *text);
-int msc_send_ussd_release_complete(struct ran_conn *conn);
+int msc_send_ussd_release_complete(struct ran_conn *conn,
+				   uint8_t transaction_id);
diff --git a/src/libmsc/gsm_04_80.c b/src/libmsc/gsm_04_80.c
index 119f0e10f..502848f0e 100644
--- a/src/libmsc/gsm_04_80.c
+++ b/src/libmsc/gsm_04_80.c
@@ -78,9 +78,10 @@ int msc_send_ussd_notify(struct ran_conn *conn, int level, const char *text)
 	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 e1019a287..078b83aea 100644
--- a/src/libmsc/msc_vty.c
+++ b/src/libmsc/msc_vty.c
@@ -1149,7 +1149,9 @@ DEFUN(subscriber_ussd_notify,
 	}
 
 	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);