diff --git a/target/linux/apm821xx/dts/wd-mybooklive.dts b/target/linux/apm821xx/dts/wd-mybooklive.dts
index 3fd636cb237da..dcb8078050dad 100644
--- a/target/linux/apm821xx/dts/wd-mybooklive.dts
+++ b/target/linux/apm821xx/dts/wd-mybooklive.dts
@@ -149,6 +149,7 @@
 	phy-map = <0x2>;
 	phy-address = <0x1>;
 	phy-handle = <&phy>;
+	phy-mode = "rgmii-id";
 
 	mdio {
 		#address-cells = <1>;