diff --git a/include/linux/fwnode_mdio.h b/include/linux/fwnode_mdio.h
index 13d4ae8fee0a..f62817c23137 100644
--- a/include/linux/fwnode_mdio.h
+++ b/include/linux/fwnode_mdio.h
@@ -40,7 +40,7 @@ static inline int fwnode_mdiobus_register(struct mii_bus *bus,
 	 * This way, we don't have to keep compat bits around in drivers.
 	 */
 
-	return mdiobus_register(mdio);
+	return mdiobus_register(bus);
 }
 #endif