diff --git a/arch/arm/boot/dts/stm32f746.dtsi b/arch/arm/boot/dts/stm32f746.dtsi
index d6b1b56f340c..4506eb97a4ab 100644
--- a/arch/arm/boot/dts/stm32f746.dtsi
+++ b/arch/arm/boot/dts/stm32f746.dtsi
@@ -371,6 +371,7 @@
 		};
 
 		rcc: rcc@40023800 {
+			#reset-cells = <1>;
 			#clock-cells = <2>;
 			compatible = "st,stm32f746-rcc", "st,stm32-rcc";
 			reg = <0x40023800 0x400>;