diff --git a/Kbuild b/Kbuild
index 94c75276..af161aa 100644
--- a/Kbuild
+++ b/Kbuild
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Kbuild for top-level directory of the kernel
 # This file takes care of the following: