diff --git a/idxseg.c b/idxseg.c
index 8084887..2ee47e3 100644
--- a/idxseg.c
+++ b/idxseg.c
@@ -1,6 +1,6 @@
 /**
     Copyright (C) powturbo 2013-2023
-    GPL v2 License
+    SPDX-License-Identifier: GPL v2 License
 
     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