diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index f81c4bcd85a2..c44b29c4a3dc 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -2388,6 +2388,7 @@ static int lan8814_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
 	struct hwtstamp_config config;
 	int txcfg = 0, rxcfg = 0;
 	int pkt_ts_enable;
+	int tx_mod;
 
 	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
 		return -EFAULT;
@@ -2437,9 +2438,14 @@ static int lan8814_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
 	lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_RX_TIMESTAMP_EN, pkt_ts_enable);
 	lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_TX_TIMESTAMP_EN, pkt_ts_enable);
 
-	if (ptp_priv->hwts_tx_type == HWTSTAMP_TX_ONESTEP_SYNC)
+	tx_mod = lanphy_read_page_reg(ptp_priv->phydev, 5, PTP_TX_MOD);
+	if (ptp_priv->hwts_tx_type == HWTSTAMP_TX_ONESTEP_SYNC) {
 		lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_TX_MOD,
-				      PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_);
+				      tx_mod | PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_);
+	} else if (ptp_priv->hwts_tx_type == HWTSTAMP_TX_ON) {
+		lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_TX_MOD,
+				      tx_mod & ~PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_);
+	}
 
 	if (config.rx_filter != HWTSTAMP_FILTER_NONE)
 		lan8814_config_ts_intr(ptp_priv->phydev, true);