diff --git a/drivers/net/mvneta.c b/drivers/net/mvneta.c
index d1c5f79..79cdb93 100644
--- a/drivers/net/mvneta.c
+++ b/drivers/net/mvneta.c
@@ -1195,7 +1195,7 @@
 
 			if (phydev->speed == SPEED_1000)
 				val |= MVNETA_GMAC_CONFIG_GMII_SPEED;
-			else
+			else if (pp->speed == SPEED_100)
 				val |= MVNETA_GMAC_CONFIG_MII_SPEED;
 
 			mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val);