diff --git a/target/linux/ramips/dts/RB750Gr3.dts b/target/linux/ramips/dts/RB750Gr3.dts
index e0df72d967..4a303edddb 100644
--- a/target/linux/ramips/dts/RB750Gr3.dts
+++ b/target/linux/ramips/dts/RB750Gr3.dts
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
 /dts-v1/;
 
 #include "mt7621.dtsi"