diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_mt7620.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_mt7620.c
index 4d012afa14..c9104aa375 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_mt7620.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_mt7620.c
@@ -205,7 +205,7 @@ static void mt7620_port_init(struct fe_priv *priv, struct device_node *np)
 		break;
 	case PHY_INTERFACE_MODE_RGMII_TXID:
 		mask = 0;
-		val_delay &= ~GSW_REG_GPCx_TXDELAY;
+		val_delay |= GSW_REG_GPCx_TXDELAY;
 		val_delay |= GSW_REG_GPCx_RXDELAY;
 		break;
 	case PHY_INTERFACE_MODE_MII: