diff --git a/arch/arm/dts/ethernut5.dts b/arch/arm/dts/ethernut5.dts
index e07715225f1..5c24deaf4b6 100644
--- a/arch/arm/dts/ethernut5.dts
+++ b/arch/arm/dts/ethernut5.dts
@@ -84,6 +84,8 @@
 	};
 
 	i2c-gpio-0 {
+		#address-cells = <1>;
+		#size-cells = <0>;
 		status = "okay";
 
 		pcf8563@50 {