diff --git a/arch/mips/boot/dts/ingenic/jz4780.dtsi b/arch/mips/boot/dts/ingenic/jz4780.dtsi
index c182a656d63b..18affff85ce3 100644
--- a/arch/mips/boot/dts/ingenic/jz4780.dtsi
+++ b/arch/mips/boot/dts/ingenic/jz4780.dtsi
@@ -155,6 +155,8 @@ rtc_dev: rtc@10003000 {
 
 		clocks = <&cgu JZ4780_CLK_RTCLK>;
 		clock-names = "rtc";
+
+		#clock-cells = <0>;
 	};
 
 	pinctrl: pin-controller@10010000 {