diff --git a/arch/arm/boot/dts/r8a7778-bockw.dts b/arch/arm/boot/dts/r8a7778-bockw.dts
index e0dab1464648..982a237ea622 100644
--- a/arch/arm/boot/dts/r8a7778-bockw.dts
+++ b/arch/arm/boot/dts/r8a7778-bockw.dts
@@ -223,6 +223,7 @@ &scif0 {
 	pinctrl-0 = <&scif0_pins>;
 	pinctrl-names = "default";
 
+	uart-has-rtscts;
 	status = "okay";
 };