diff --git a/arch/arc/dts/Makefile b/arch/arc/dts/Makefile
index 5bc6f44..d481fcd 100644
--- a/arch/arc/dts/Makefile
+++ b/arch/arc/dts/Makefile
@@ -1,3 +1,7 @@
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
 dtb-$(CONFIG_TARGET_ARCANGEL4) +=  arcangel4.dtb
 dtb-$(CONFIG_TARGET_TB100) +=  abilis_tb100.dtb