diff --git a/arch/arm/boot/dts/am335x-bone-common.dtsi b/arch/arm/boot/dts/am335x-bone-common.dtsi
index c560cb7d3175..fbb11dd76f08 100644
--- a/arch/arm/boot/dts/am335x-bone-common.dtsi
+++ b/arch/arm/boot/dts/am335x-bone-common.dtsi
@@ -291,6 +291,7 @@ &davinci_mdio {
 
 &mmc1 {
 	status = "okay";
+	bus-width = <0x4>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&mmc1_pins>;
 	cd-gpios = <&gpio0 6 GPIO_ACTIVE_HIGH>;