diff --git a/src/eth/rtl/taxi_axis_baser_tx_32.sv b/src/eth/rtl/taxi_axis_baser_tx_32.sv
index c92b9ba..0806170 100644
--- a/src/eth/rtl/taxi_axis_baser_tx_32.sv
+++ b/src/eth/rtl/taxi_axis_baser_tx_32.sv
@@ -62,7 +62,7 @@ module taxi_axis_baser_tx_32 #
      * PTP
      */
     input  wire logic [PTP_TS_W-1:0]      ptp_ts,
-    output wire logic                     ptp_ts_cor_sync,
+    output wire logic [GBX_CNT-1:0]       ptp_ts_cor_sync,
     input  wire logic [PTP_TS_COR_W-1:0]  ptp_ts_cor_val = '0,
 
     /*
@@ -270,7 +270,7 @@ assign m_axis_tx_cpl.tuser = '0;
 
 assign tx_os_ready = tx_os_ready_reg;
 
-assign ptp_ts_cor_sync = (GBX_IF_EN && PTP_TS_COR_EN) ? tx_gbx_req_sync : 1'b0;
+assign ptp_ts_cor_sync = (GBX_IF_EN && PTP_TS_COR_EN) ? tx_gbx_req_sync : '0;
 
 assign tx_start_packet = start_packet_reg;
 
diff --git a/src/eth/rtl/taxi_axis_baser_tx_64.sv b/src/eth/rtl/taxi_axis_baser_tx_64.sv
index d306376..c2419f5 100644
--- a/src/eth/rtl/taxi_axis_baser_tx_64.sv
+++ b/src/eth/rtl/taxi_axis_baser_tx_64.sv
@@ -63,7 +63,7 @@ module taxi_axis_baser_tx_64 #
      * PTP
      */
     input  wire logic [PTP_TS_W-1:0]      ptp_ts,
-    output wire logic                     ptp_ts_cor_sync,
+    output wire logic [GBX_CNT-1:0]       ptp_ts_cor_sync,
     input  wire logic [PTP_TS_COR_W-1:0]  ptp_ts_cor_val = '0,
 
     /*
@@ -286,7 +286,7 @@ assign m_axis_tx_cpl.tuser = '0;
 
 assign tx_os_ready = tx_os_ready_reg;
 
-assign ptp_ts_cor_sync = (GBX_IF_EN && PTP_TS_COR_EN) ? tx_gbx_req_sync : 1'b0;
+assign ptp_ts_cor_sync = (GBX_IF_EN && PTP_TS_COR_EN) ? tx_gbx_req_sync : '0;
 
 assign tx_start_packet = start_packet_reg;
 
diff --git a/src/eth/tb/taxi_axis_baser_tx_32/test_taxi_axis_baser_tx_32.sv b/src/eth/tb/taxi_axis_baser_tx_32/test_taxi_axis_baser_tx_32.sv
index 04113ed..86ad434 100644
--- a/src/eth/tb/taxi_axis_baser_tx_32/test_taxi_axis_baser_tx_32.sv
+++ b/src/eth/tb/taxi_axis_baser_tx_32/test_taxi_axis_baser_tx_32.sv
@@ -57,7 +57,7 @@ logic tx_os_valid;
 logic tx_os_ready;
 
 logic [PTP_TS_W-1:0] ptp_ts;
-logic ptp_ts_cor_sync;
+logic [GBX_CNT-1:0] ptp_ts_cor_sync;
 logic [PTP_TS_COR_W-1:0] ptp_ts_cor_val;
 
 logic [15:0] cfg_tx_max_pkt_len;
diff --git a/src/eth/tb/taxi_axis_baser_tx_64/test_taxi_axis_baser_tx_64.sv b/src/eth/tb/taxi_axis_baser_tx_64/test_taxi_axis_baser_tx_64.sv
index be48dd2..1cde01c 100644
--- a/src/eth/tb/taxi_axis_baser_tx_64/test_taxi_axis_baser_tx_64.sv
+++ b/src/eth/tb/taxi_axis_baser_tx_64/test_taxi_axis_baser_tx_64.sv
@@ -57,7 +57,7 @@ logic tx_os_valid;
 logic tx_os_ready;
 
 logic [PTP_TS_W-1:0] ptp_ts;
-logic ptp_ts_cor_sync;
+logic [GBX_CNT-1:0] ptp_ts_cor_sync;
 logic [PTP_TS_COR_W-1:0] ptp_ts_cor_val;
 
 logic [15:0] cfg_tx_max_pkt_len;