diff --git a/scripts/generate_errors.pl b/scripts/generate_errors.pl
index 2850a6f..d8b0488 100755
--- a/scripts/generate_errors.pl
+++ b/scripts/generate_errors.pl
@@ -6,7 +6,13 @@
 # or generate_errors.pl include_dir data_dir error_file
 #
 # Copyright (C) 2011-2018, Arm Limited, All Rights Reserved
-# SPDX-License-Identifier: Apache-2.0
+# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+#
+# This file is provided under the Apache License 2.0, or the
+# GNU General Public License v2.0 or later.
+#
+# **********
+# Apache License 2.0:
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may
 # not use this file except in compliance with the License.
@@ -20,6 +26,27 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+# **********
+#
+# **********
+# GNU General Public License v2.0 or later:
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# **********
+#
 # This file is part of Mbed TLS (https://tls.mbed.org)
 
 use strict;