diff --git a/rubygem-clutter-gdk.spec b/rubygem-clutter-gdk.spec
index dab062a..e04b1d3 100644
--- a/rubygem-clutter-gdk.spec
+++ b/rubygem-clutter-gdk.spec
@@ -7,7 +7,9 @@ Version:	4.1.2
 Release:	1%{?dist}
 
 Summary:	Ruby binding of GDK specific API of Clutter
-License:	LGPLv2+
+# SPDX confirmed
+# LGPL-2.1-or-later: gemspec
+License:	LGPL-2.1-or-later
 URL:		http://ruby-gnome2.osdn.jp/
 
 Source0:	https://rubygems.org/gems/%{gem_name}-%{version}.gem