diff --git a/sys/dev/mii/brgphy.c b/sys/dev/mii/brgphy.c
index 85f24280fc4a..09ff2c0123d5 100644
--- a/sys/dev/mii/brgphy.c
+++ b/sys/dev/mii/brgphy.c
@@ -86,7 +86,7 @@ static devclass_t brgphy_devclass;
 static driver_t brgphy_driver = {
 	"brgphy",
 	brgphy_methods,
-	sizeof(struct mii_softc)
+	sizeof(struct brgphy_softc)
 };
 
 DRIVER_MODULE(brgphy, miibus, brgphy_driver, brgphy_devclass, 0, 0);