diff --git a/arch/arm/dts/stm32f429-disco-u-boot.dtsi b/arch/arm/dts/stm32f429-disco-u-boot.dtsi
index 297cc56144..c993f86be8 100644
--- a/arch/arm/dts/stm32f429-disco-u-boot.dtsi
+++ b/arch/arm/dts/stm32f429-disco-u-boot.dtsi
@@ -33,7 +33,7 @@
 
 		fmc: fmc@A0000000 {
 			compatible = "st,stm32-fmc";
-			reg = <0xA0000000 0x1000>;
+			reg = <0xa0000000 0x1000>;
 			clocks = <&rcc 0 STM32F4_AHB3_CLOCK(FMC)>;
 			pinctrl-0 = <&fmc_pins>;
 			pinctrl-names = "default";