diff --git a/sys/dev/msk/if_msk.c b/sys/dev/msk/if_msk.c
index 3af1b205fda..8dc2d30d823 100644
--- a/sys/dev/msk/if_msk.c
+++ b/sys/dev/msk/if_msk.c
@@ -1362,8 +1362,8 @@ mskc_reset(struct msk_softc *sc)
 	/* Reset GPHY/GMAC Control */
 	for (i = 0; i < sc->msk_num_port; i++) {
 		/* GPHY Control reset. */
-		CSR_WRITE_4(sc, MR_ADDR(i, GPHY_CTRL), GPC_RST_SET);
-		CSR_WRITE_4(sc, MR_ADDR(i, GPHY_CTRL), GPC_RST_CLR);
+		CSR_WRITE_1(sc, MR_ADDR(i, GPHY_CTRL), GPC_RST_SET);
+		CSR_WRITE_1(sc, MR_ADDR(i, GPHY_CTRL), GPC_RST_CLR);
 		/* GMAC Control reset. */
 		CSR_WRITE_4(sc, MR_ADDR(i, GMAC_CTRL), GMC_RST_SET);
 		CSR_WRITE_4(sc, MR_ADDR(i, GMAC_CTRL), GMC_RST_CLR);