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-rw-r--r--src/gradient-chemistry.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/gradient-chemistry.h b/src/gradient-chemistry.h
index 4da56af13..c80b6370d 100644
--- a/src/gradient-chemistry.h
+++ b/src/gradient-chemistry.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_SP_GRADIENT_CHEMISTRY_H
#define SEEN_SP_GRADIENT_CHEMISTRY_H
@@ -15,7 +16,7 @@
* Copyright (C) 2001-2002 Lauris Kaplinski
* Copyright (C) 2001 Ximian, Inc.
*
- * Released under GNU GPL, read the file 'COPYING' for more information
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "object/sp-gradient.h"