diff --git a/sys/dev/mii/miidevs b/sys/dev/mii/miidevs
index d2931f38a2c..60a883a10c4 100644
--- a/sys/dev/mii/miidevs
+++ b/sys/dev/mii/miidevs
@@ -304,6 +304,7 @@ model yyREALTEK RTL8201L	0x0020 RTL8201L 10/100 media interface
 model xxREALTEK RTL8169S	0x0011 RTL8169S/8110S/8211 1000BASE-T media interface
 model REALTEK RTL8305SC		0x0005 RTL8305SC 10/100 802.1q switch
 model REALTEK RTL8201E		0x0008 RTL8201E 10/100 media interface
+model REALTEK RTL8251		0x0000 RTL8251 1000BASE-T media interface
 model REALTEK RTL8169S		0x0011 RTL8169S/8110S/8211 1000BASE-T media interface
 
 /* Seeq Seeq PHYs */
diff --git a/sys/dev/mii/rgephy.c b/sys/dev/mii/rgephy.c
index 6a34303e530..fbeeb51054f 100644
--- a/sys/dev/mii/rgephy.c
+++ b/sys/dev/mii/rgephy.c
@@ -91,6 +91,7 @@ static void	rgephy_load_dspcode(struct mii_softc *);
 
 static const struct mii_phydesc rgephys[] = {
 	MII_PHY_DESC(REALTEK, RTL8169S),
+	MII_PHY_DESC(REALTEK, RTL8251),
 	MII_PHY_END
 };
 
@@ -395,7 +396,8 @@ rgephy_loop(struct mii_softc *sc)
 {
 	int i;
 
-	if (sc->mii_mpd_rev < 2) {
+	if (sc->mii_mpd_model != MII_MODEL_REALTEK_RTL8251 &&
+	    sc->mii_mpd_rev < 2) {
 		PHY_WRITE(sc, RGEPHY_MII_BMCR, RGEPHY_BMCR_PDOWN);
 		DELAY(1000);
 	}
@@ -428,7 +430,8 @@ rgephy_load_dspcode(struct mii_softc *sc)
 {
 	int val;
 
-	if (sc->mii_mpd_rev >= 2)
+	if (sc->mii_mpd_model == MII_MODEL_REALTEK_RTL8251 ||
+	    sc->mii_mpd_rev >= 2)
 		return;
 
 	PHY_WRITE(sc, 31, 0x0001);