9 files changed, 20 insertions, 2 deletions
diff --git a/applets/systray/fixedtip.c b/applets/systray/fixedtip.c
index ce19067..bc7d86d 100644
--- a/applets/systray/fixedtip.c
+++ b/applets/systray/fixedtip.c
@@ -3,7 +3,9 @@
 /* 
  * Copyright (C) 2001 Havoc Pennington
  * Copyright (C) 2003-2006 Vincent Untz
- * 
+ *
+ * SPDX-License-Identifier: GPL-2.0-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
diff --git a/applets/systray/fixedtip.h b/applets/systray/fixedtip.h
index a29e85c..e5b69c0 100644
--- a/applets/systray/fixedtip.h
+++ b/applets/systray/fixedtip.h
@@ -3,7 +3,9 @@
 /* 
  * Copyright (C) 2001 Havoc Pennington, 2002 Red Hat Inc.
  * Copyright (C) 2003-2006 Vincent Untz
- * 
+ *
+ * SPDX-License-Identifier: GPL-2.0-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
diff --git a/applets/systray/na-tray-child.c b/applets/systray/na-tray-child.c
index 1042940..949d612 100644
--- a/applets/systray/na-tray-child.c
+++ b/applets/systray/na-tray-child.c
@@ -3,6 +3,8 @@
  * Copyright (C) 2003-2006 Vincent Untz
  * Copyright (C) 2008 Red Hat, Inc.
  *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
diff --git a/applets/systray/na-tray-child.h b/applets/systray/na-tray-child.h
index 29cab3b..c3f181b 100644
--- a/applets/systray/na-tray-child.h
+++ b/applets/systray/na-tray-child.h
@@ -4,6 +4,8 @@
  * Copyright (C) 2003-2006 Vincent Untz
  * Copyright (C) 2008 Red Hat, Inc.
  *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
diff --git a/applets/systray/na-tray-manager.c b/applets/systray/na-tray-manager.c
index 8999350..493ecd1 100644
--- a/applets/systray/na-tray-manager.c
+++ b/applets/systray/na-tray-manager.c
@@ -2,6 +2,8 @@
  * Copyright (C) 2002 Anders Carlsson <andersca@gnu.org>
  * Copyright (C) 2003-2006 Vincent Untz
  *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
diff --git a/applets/systray/na-tray-manager.h b/applets/systray/na-tray-manager.h
index 0408959..b14db4e 100644
--- a/applets/systray/na-tray-manager.h
+++ b/applets/systray/na-tray-manager.h
@@ -3,6 +3,8 @@
  * Copyright (C) 2002 Anders Carlsson <andersca@gnu.org>
  * Copyright (C) 2003-2006 Vincent Untz
  *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
diff --git a/applets/systray/na-tray.c b/applets/systray/na-tray.c
index 714bd90..9d98df3 100644
--- a/applets/systray/na-tray.c
+++ b/applets/systray/na-tray.c
@@ -3,6 +3,8 @@
  * Copyright (C) 2003-2006 Vincent Untz
  * Copyright (C) 2007 Christian Persch
  *
+ * SPDX-License-Identifier: GPL-2.0-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
diff --git a/applets/systray/na-tray.h b/applets/systray/na-tray.h
index 8fd7db4..af1a099 100644
--- a/applets/systray/na-tray.h
+++ b/applets/systray/na-tray.h
@@ -3,6 +3,8 @@
  * Copyright (C) 2002 Anders Carlsson <andersca@gnu.org>
  * Copyright (C) 2003-2006 Vincent Untz
  *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
diff --git a/applets/systray/systray.c b/applets/systray/systray.c
index 39698a8..92d0ae0 100644
--- a/applets/systray/systray.c
+++ b/applets/systray/systray.c
@@ -2,6 +2,8 @@
 /*
  * (C) 2006-2013 Intel Corp
  *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
  * Author: Jorn Baayen <jorn@openedhand.com>
  *         Ross Burton <ross.burton@intel.com>
  *