Index: sys/dev/mii/atphy.c
===================================================================
--- sys/dev/mii/atphy.c	(revision 265477)
+++ sys/dev/mii/atphy.c	(working copy)
@@ -338,7 +338,9 @@ atphy_setmedia(struct mii_softc *sc, int media)
 {
 	uint16_t anar;
 
-	anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
+	anar = PHY_READ(sc, MII_ANAR);
+	anar &= ANAR_NP;
+	anar |= BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
 	if ((IFM_SUBTYPE(media) == IFM_AUTO || (media & IFM_FDX) != 0) &&
 	    ((media & IFM_FLOW) != 0 ||
 	    (sc->mii_flags & MIIF_FORCEPAUSE) != 0))