diff --git a/target/linux/mediatek/dts/mt7981b-zyxel-nwa50ax-pro.dts b/target/linux/mediatek/dts/mt7981b-zyxel-nwa50ax-pro.dts
index 75dd84c9d7e..6ca7ba040a1 100644
--- a/target/linux/mediatek/dts/mt7981b-zyxel-nwa50ax-pro.dts
+++ b/target/linux/mediatek/dts/mt7981b-zyxel-nwa50ax-pro.dts
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT)
 /dts-v1/;
 
 #include "mt7981.dtsi"