diff --git a/arch/arm/boot/dts/stm32f429.dtsi b/arch/arm/boot/dts/stm32f429.dtsi
index 309e7e335ab7..e35d782e7e5f 100644
--- a/arch/arm/boot/dts/stm32f429.dtsi
+++ b/arch/arm/boot/dts/stm32f429.dtsi
@@ -310,6 +310,7 @@ iwdg: watchdog@40003000 {
 			compatible = "st,stm32-iwdg";
 			reg = <0x40003000 0x400>;
 			clocks = <&clk_lsi>;
+			clock-names = "lsi";
 			status = "disabled";
 		};