diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
index 91e806c1aa21..8490c0cf80a8 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
@@ -599,7 +599,7 @@ static int mlx5_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin,
 static const struct ptp_clock_info mlx5_ptp_clock_info = {
 	.owner		= THIS_MODULE,
 	.name		= "mlx5_ptp",
-	.max_adj	= 100000000,
+	.max_adj	= 50000000,
 	.n_alarm	= 0,
 	.n_ext_ts	= 0,
 	.n_per_out	= 0,