diff --git a/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c b/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c
index 9a1239f351..4e1cd984e6 100644
--- a/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c
+++ b/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c
@@ -3630,7 +3630,6 @@ static int rtpcs_931x_sds_config_fiber_1g(struct rtpcs_serdes *sds)
 {
 	rtpcs_sds_write_bits(sds, 0x43, 0x12, 15, 14, 0x0);
 
-	rtpcs_sds_write_bits(sds, 0x42, 0x0, 12, 12, 0x1);
 	rtpcs_sds_write_bits(sds, 0x42, 0x0, 6, 6, 0x1);
 	rtpcs_sds_write_bits(sds, 0x42, 0x0, 13, 13, 0x0);