diff --git a/conf/machine/mcm-imx8m-mini.conf b/conf/machine/mcm-imx8m-mini.conf
index 1aa9512..6b5a00f 100644
--- a/conf/machine/mcm-imx8m-mini.conf
+++ b/conf/machine/mcm-imx8m-mini.conf
@@ -14,6 +14,7 @@ MACHINE_FEATURES += " pci wifi bluetooth optee "
 KERNEL_DEVICETREE = "compulab/mcm-imx8m-mini.dtb "
 KERNEL_DEVICETREE += "compulab/mcm-imx8m-mini-thermal.dtb "
 KERNEL_DEVICETREE += "compulab/sbc-mcm-imx8m-mini.dtb "
+KERNEL_DEVICETREE += "compulab/sbc-mcm-imx8m-mini-rs485.dtb "
 
 UBOOT_CONFIG ??= "sd"
 UBOOT_CONFIG[sd] = "mcm-imx8m-mini_defconfig,sdcard"