diff --git a/pcu/GPRS_TBF.ttcn b/pcu/GPRS_TBF.ttcn
index 951cf4a..9fbe191 100644
--- a/pcu/GPRS_TBF.ttcn
+++ b/pcu/GPRS_TBF.ttcn
@@ -7,9 +7,10 @@
  *
  * 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 GSM_Types all;
 import from Osmocom_Types all;
 import from General_Types all;