diff --git a/library/RTP_Emulation.ttcn b/library/RTP_Emulation.ttcn
index 7b9be68..31bf68a 100644
--- a/library/RTP_Emulation.ttcn
+++ b/library/RTP_Emulation.ttcn
@@ -14,6 +14,17 @@
  *  * enable/disable generation/verification of RTCP
  */
 
+/* (C) 2017-2018 Harald Welte <laforge@gnumonks.org>
+ * (C) 2018-2019 sysmocom - s.f.m.c. GmbH
+ * All rights reserved.
+ *
+ * Released under the terms of GNU General Public License, Version 2 or
+ * (at your option) any later version.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+
 /* Ideas:
 
 * each component consists of transmitter and receiver