diff --git a/target/linux/ramips/dts/mt7628an_tplink_tl-mr6400-v4.dts b/target/linux/ramips/dts/mt7628an_tplink_tl-mr6400-v4.dts
index f0b87b5312..787abfad55 100644
--- a/target/linux/ramips/dts/mt7628an_tplink_tl-mr6400-v4.dts
+++ b/target/linux/ramips/dts/mt7628an_tplink_tl-mr6400-v4.dts
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
 #include "mt7628an_tplink_8m.dtsi"
 
 / {