diff --git a/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981.dtsi b/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981.dtsi
index ecfe21f73a..c497fff913 100644
--- a/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981.dtsi
+++ b/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981.dtsi
@@ -437,7 +437,7 @@
 		reset-names = "mtketh";
 		status = "disabled";
 		mtketh-ppe-num = <2>;
-		ext-devices-prefix = "usb","wwan","rmnet","eth2","eth3","eth4","eth5";
+		ext-devices-prefix = "usb","wwan","rmnet","eth2","eth3","eth4","eth1";
 	};
 
 	sgmiisys0: syscon@10060000 {