diff --git a/target/linux/ramips/dts/WD03.dts b/target/linux/ramips/dts/WD03.dts
index 17bc58e07f..c9ea9174b3 100644
--- a/target/linux/ramips/dts/WD03.dts
+++ b/target/linux/ramips/dts/WD03.dts
@@ -95,7 +95,6 @@
 
 &ethernet {
 	mtd-mac-address = <&factory 0x4000>;
-	ralink,port-map = "wllll";
 };
 
 &wmac {