diff --git a/sys/dev/mii/mii.c b/sys/dev/mii/mii.c
index 79378f5e203..3df5dfa6c9e 100644
--- a/sys/dev/mii/mii.c
+++ b/sys/dev/mii/mii.c
@@ -438,6 +438,9 @@ mii_attach(device_t dev, device_t *miibus, struct ifnet *ifp,
 		rv = bus_generic_attach(dev);
 		if (rv != 0)
 			goto fail;
+
+		/* Attaching of the PHY drivers is done in miibus_attach(). */
+		return (0);
 	}
 	rv = bus_generic_attach(*miibus);
 	if (rv != 0)