diff --git a/Documentation/devicetree/bindings/net/dsa/b53.txt b/Documentation/devicetree/bindings/net/dsa/b53.txt
index cfd1afdc6e94..80437b2fc935 100644
--- a/Documentation/devicetree/bindings/net/dsa/b53.txt
+++ b/Documentation/devicetree/bindings/net/dsa/b53.txt
@@ -106,6 +106,7 @@ Ethernet switch connected via MDIO to the host, CPU port wired to eth0:
 
 		switch0: ethernet-switch@30 {
 			compatible = "brcm,bcm53125";
+			reg = <30>;
 			#address-cells = <1>;
 			#size-cells = <0>;