diff --git a/target/linux/realtek/files-6.18/drivers/net/pcs/pcs-rtl-otto.c b/target/linux/realtek/files-6.18/drivers/net/pcs/pcs-rtl-otto.c
index 12f411db48..9da31a8bab 100644
--- a/target/linux/realtek/files-6.18/drivers/net/pcs/pcs-rtl-otto.c
+++ b/target/linux/realtek/files-6.18/drivers/net/pcs/pcs-rtl-otto.c
@@ -3658,10 +3658,11 @@ static int rtpcs_931x_sds_config_attachment(struct rtpcs_serdes *sds,
 
 static int rtpcs_931x_sds_config_fiber_1g(struct rtpcs_serdes *sds)
 {
-	rtpcs_sds_write_bits(sds, DIGI_1(PAGE_FIB_EXT), 0x12, 15, 14, 0x0);
+	rtpcs_sds_write_bits(sds, DIGI_1(PAGE_FIB_EXT), 0x13, 15, 14, 0x0);
 
 	rtpcs_sds_write_bits(sds, DIGI_1(PAGE_FIB), 0x0, 6, 6, 0x1);
 	rtpcs_sds_write_bits(sds, DIGI_1(PAGE_FIB), 0x0, 13, 13, 0x0);
+	rtpcs_sds_write_bits(sds, DIGI_1(PAGE_SDS), 0x4, 2, 2, 0x1); /* EN_LINK_FIB1G */
 
 	return 0;
 }