diff --git a/arch/loongarch/boot/dts/loongson-2k0500-ref.dts b/arch/loongarch/boot/dts/loongson-2k0500-ref.dts
index 7ace54c84244..d2a3ed9fa578 100644
--- a/arch/loongarch/boot/dts/loongson-2k0500-ref.dts
+++ b/arch/loongarch/boot/dts/loongson-2k0500-ref.dts
@@ -73,14 +73,12 @@ &gmac0 {
 	status = "okay";
 
 	phy-mode = "rgmii-id";
-	bus_id = <0x0>;
 };
 
 &gmac1 {
 	status = "okay";
 
 	phy-mode = "rgmii-id";
-	bus_id = <0x1>;
 };
 
 &i2c0 {