diff --git a/drivers/net/phy/mdio-octeon.c b/drivers/net/phy/mdio-octeon.c
index bd12ba941be5..826d961f39f7 100644
--- a/drivers/net/phy/mdio-octeon.c
+++ b/drivers/net/phy/mdio-octeon.c
@@ -118,7 +118,8 @@ static int __devinit octeon_mdiobus_probe(struct platform_device *pdev)
 	bus->mii_bus->priv = bus;
 	bus->mii_bus->irq = bus->phy_irq;
 	bus->mii_bus->name = "mdio-octeon";
-	snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%x", bus->unit);
+	snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
+		bus->mii_bus->name, bus->unit);
 	bus->mii_bus->parent = &pdev->dev;
 
 	bus->mii_bus->read = octeon_mdiobus_read;