diff --git a/target/linux/realtek/files-5.10/drivers/net/ethernet/rtl838x_eth.c b/target/linux/realtek/files-5.10/drivers/net/ethernet/rtl838x_eth.c
index cf6aabc6142ff3..aece1356e40cf3 100644
--- a/target/linux/realtek/files-5.10/drivers/net/ethernet/rtl838x_eth.c
+++ b/target/linux/realtek/files-5.10/drivers/net/ethernet/rtl838x_eth.c
@@ -126,7 +126,7 @@ static void rtl839x_create_tx_header(struct p_hdr *h, int dest_port, int prio)
 			h->cpu_tag[4] = BIT(dest_port) >> 16;
 			h->cpu_tag[5] = BIT(dest_port) & 0xffff;
 		}
-		h->cpu_tag[2] |= BIT(5); // Enable destination port mask use
+		h->cpu_tag[2] |= BIT(4); // Enable destination port mask use
 		h->cpu_tag[2] |= BIT(8); // Enable L2 Learning
 		// Set internal priority and AS_PRIO
 		if (prio >= 0)