diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index f973314b1724..54379297a748 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -205,6 +205,12 @@ void mlx5e_build_ptys2ethtool_map(void)
 				       ETHTOOL_LINK_MODE_200000baseLR4_ER4_FR4_Full_BIT,
 				       ETHTOOL_LINK_MODE_200000baseDR4_Full_BIT,
 				       ETHTOOL_LINK_MODE_200000baseCR4_Full_BIT);
+	MLX5_BUILD_PTYS2ETHTOOL_CONFIG(MLX5E_400GAUI_8_400GBASE_CR8, ext,
+				       ETHTOOL_LINK_MODE_400000baseKR8_Full_BIT,
+				       ETHTOOL_LINK_MODE_400000baseSR8_Full_BIT,
+				       ETHTOOL_LINK_MODE_400000baseLR8_ER8_FR8_Full_BIT,
+				       ETHTOOL_LINK_MODE_400000baseDR8_Full_BIT,
+				       ETHTOOL_LINK_MODE_400000baseCR8_Full_BIT);
 	MLX5_BUILD_PTYS2ETHTOOL_CONFIG(MLX5E_100GAUI_1_100GBASE_CR_KR, ext,
 				       ETHTOOL_LINK_MODE_100000baseKR_Full_BIT,
 				       ETHTOOL_LINK_MODE_100000baseSR_Full_BIT,