diff --git a/arch/arm/boot/dts/sunxi-h3-h5.dtsi b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
index a663c7c..71c1afa 100644
--- a/arch/arm/boot/dts/sunxi-h3-h5.dtsi
+++ b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
@@ -300,6 +307,7 @@
 			resets = <&ccu RST_BUS_MMC0>;
 			reset-names = "ahb";
 			interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
+			bus-width = <0x4>;
 			status = "disabled";
 			#address-cells = <1>;
 			#size-cells = <0>;