diff --git a/target/linux/ath79/dts/ar7242_buffalo_wzr-hp-g450h.dts b/target/linux/ath79/dts/ar7242_buffalo_wzr-hp-g450h.dts
index 81290479b08..932144c2272 100644
--- a/target/linux/ath79/dts/ar7242_buffalo_wzr-hp-g450h.dts
+++ b/target/linux/ath79/dts/ar7242_buffalo_wzr-hp-g450h.dts
@@ -79,6 +79,7 @@
 		qca,no-eeprom;
 		#gpio-cells = <2>;
 		gpio-controller;
+		qca,tx-gain-buffalo;
 	};
 };