1 files changed, 2 insertions, 1 deletions
diff --git a/src/rdf.h b/src/rdf.h
index c3ced1583..f5abda0a3 100644
--- a/src/rdf.h
+++ b/src/rdf.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /** @file
  * @brief headers for RDF types
  */
@@ -6,7 +7,7 @@
  *  Jon A. Cruz <jon@joncruz.org>
  *
  * Copyright (C) 2004 Authors
- * Released under GNU GPL, read the file 'COPYING' for more information
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 #ifndef SEEN_RDF_H
 #define SEEN_RDF_H