diff --git a/Makefile b/Makefile
index 3671772..4010dad 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# Copyright 2021 Jookia <contact@jookia.org>
+
 SHELL=/bin/bash
 
 build: _build