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-rw-r--r--src/codec/gsm610.c2
-rw-r--r--src/codec/gsm620.c2
-rw-r--r--src/codec/gsm660.c2
-rw-r--r--src/codec/gsm690.c2
4 files changed, 8 insertions, 0 deletions
diff --git a/src/codec/gsm610.c b/src/codec/gsm610.c
index d5a21108..a05eabab 100644
--- a/src/codec/gsm610.c
+++ b/src/codec/gsm610.c
@@ -5,6 +5,8 @@
*
* All Rights Reserved
*
+ * SPDX-License-Identifier: GPL-2.0+
+ *
* 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
diff --git a/src/codec/gsm620.c b/src/codec/gsm620.c
index b1a0b319..282781fd 100644
--- a/src/codec/gsm620.c
+++ b/src/codec/gsm620.c
@@ -5,6 +5,8 @@
*
* All Rights Reserved
*
+ * SPDX-License-Identifier: GPL-2.0+
+ *
* 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
diff --git a/src/codec/gsm660.c b/src/codec/gsm660.c
index 2f5c6a25..4f7bb099 100644
--- a/src/codec/gsm660.c
+++ b/src/codec/gsm660.c
@@ -5,6 +5,8 @@
*
* All Rights Reserved
*
+ * SPDX-License-Identifier: GPL-2.0+
+ *
* 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
diff --git a/src/codec/gsm690.c b/src/codec/gsm690.c
index 1ee74d0b..19557164 100644
--- a/src/codec/gsm690.c
+++ b/src/codec/gsm690.c
@@ -5,6 +5,8 @@
*
* All Rights Reserved
*
+ * SPDX-License-Identifier: GPL-2.0+
+ *
* 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