diff --git a/arch/arm/boot/dts/at91sam9g25ek.dts b/arch/arm/boot/dts/at91sam9g25ek.dts
index 30bfd2e12cae..91a71774472e 100644
--- a/arch/arm/boot/dts/at91sam9g25ek.dts
+++ b/arch/arm/boot/dts/at91sam9g25ek.dts
@@ -56,6 +56,7 @@
 				status = "okay";
 				port {
 					isi_0: endpoint@0 {
+						reg = <0>;
 						remote-endpoint = <&ov2640_0>;
 						bus-width = <8>;
 						vsync-active = <1>;