diff --git a/pcu/PCU_Tests_RAW_SNS.ttcn b/pcu/PCU_Tests_RAW_SNS.ttcn
index 9bedff9..28dd654 100644
--- a/pcu/PCU_Tests_RAW_SNS.ttcn
+++ b/pcu/PCU_Tests_RAW_SNS.ttcn
@@ -1,5 +1,15 @@
 module PCU_Tests_RAW_SNS {
 
+/* Osmocom PCU test suite for IP Sub-Network-Service (SNS) in TTCN-3
+ * (C) 2018-2019 Harald Welte <laforge@gnumonks.org>
+ * 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
+ */
+
 import from Osmocom_Types all;
 import from PCU_Tests all;
 import from PCU_Tests_RAW all;