diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-common.h b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
index 9795419aac2da8c5292a4384c751206d98edbfef..d07edf9eaa697f4cbb309d2957d4d02be5e1be23 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-common.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
@@ -1339,6 +1339,7 @@
 #define XGBE_AN_CL37_PCS_MODE_BASEX	0x00
 #define XGBE_AN_CL37_PCS_MODE_SGMII	0x04
 #define XGBE_AN_CL37_TX_CONFIG_MASK	0x08
+#define XGBE_AN_CL37_MII_CTRL_8BIT	0x0100
 
 /* Bit setting and getting macros
  *  The get macro will extract the current bit field value from within
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
index 80684914dd8a7516e57743c30033c5e357395be8..2222bbf8d0a448e7dec9d46dd91b9c2ed0311e08 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
@@ -982,6 +982,8 @@ static void xgbe_an37_init(struct xgbe_prv_data *pdata)
 		break;
 	}
 
+	reg |= XGBE_AN_CL37_MII_CTRL_8BIT;
+
 	XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL, reg);
 
 	netif_dbg(pdata, link, pdata->netdev, "CL37 AN (%s) initialized\n",