diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index a37f12e..feaa890 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the linux kernel.
 #