diff --git a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
index 019abce843bf..c1780e7ee294 100644
--- a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
@@ -358,7 +358,7 @@ lsio_mu0: mailbox@5d1b0000 {
 			compatible = "fsl,imx8qxp-mu", "fsl,imx6sx-mu";
 			reg = <0x5d1b0000 0x10000>;
 			interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>;
-			#mbox-cells = <0>;
+			#mbox-cells = <2>;
 			status = "disabled";
 		};
 
@@ -373,7 +373,7 @@ lsio_mu3: mailbox@5d1e0000 {
 			compatible = "fsl,imx8qxp-mu", "fsl,imx6sx-mu";
 			reg = <0x5d1e0000 0x10000>;
 			interrupts = <GIC_SPI 179 IRQ_TYPE_LEVEL_HIGH>;
-			#mbox-cells = <0>;
+			#mbox-cells = <2>;
 			status = "disabled";
 		};
 
@@ -381,7 +381,7 @@ lsio_mu4: mailbox@5d1f0000 {
 			compatible = "fsl,imx8qxp-mu", "fsl,imx6sx-mu";
 			reg = <0x5d1f0000 0x10000>;
 			interrupts = <GIC_SPI 180 IRQ_TYPE_LEVEL_HIGH>;
-			#mbox-cells = <0>;
+			#mbox-cells = <2>;
 			status = "disabled";
 		};