diff --git a/target/linux/lantiq/dts/TDW89X0.dtsi b/target/linux/lantiq/dts/TDW89X0.dtsi
index d27aed5cf8..e4094ec610 100644
--- a/target/linux/lantiq/dts/TDW89X0.dtsi
+++ b/target/linux/lantiq/dts/TDW89X0.dtsi
@@ -180,6 +180,7 @@
 		ath,mac-offset = <0xf100>;
 		ath,mac-increment;
 		ath,led-pin = <0>;
+		ath,disable-5ghz;
 	};
 
 	gpio-keys-polled {