diff --git a/arch/arm/boot/dts/r8a7778.dtsi b/arch/arm/boot/dts/r8a7778.dtsi
index a31817b2dda7..a39472aab867 100644
--- a/arch/arm/boot/dts/r8a7778.dtsi
+++ b/arch/arm/boot/dts/r8a7778.dtsi
@@ -33,6 +33,7 @@ cpu@0 {
 			compatible = "arm,cortex-a9";
 			reg = <0>;
 			clock-frequency = <800000000>;
+			clocks = <&z_clk>;
 		};
 	};