diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 979925394828..ffdb7b113f17 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -3594,7 +3594,7 @@ static void mvneta_mac_config(struct phylink_config *config, unsigned int mode,
 	/* When at 2.5G, the link partner can send frames with shortened
 	 * preambles.
 	 */
-	if (state->speed == SPEED_2500)
+	if (state->interface == PHY_INTERFACE_MODE_2500BASEX)
 		new_ctrl4 |= MVNETA_GMAC4_SHORT_PREAMBLE_ENABLE;
 
 	if (pp->phy_interface != state->interface) {