diff --git a/libraries/io/eth/src/vhdl/eth_tester_rx.vhd b/libraries/io/eth/src/vhdl/eth_tester_rx.vhd
index 13aa52024173354434c8b44a679a73664eb49eab..0fe6818b4555e3eb641a53ef5e77fc0cae10dfac 100644
--- a/libraries/io/eth/src/vhdl/eth_tester_rx.vhd
+++ b/libraries/io/eth/src/vhdl/eth_tester_rx.vhd
@@ -96,6 +96,7 @@ architecture str of eth_tester_rx is
   signal unpacked_data       : std_logic_vector(c_octet_w - 1 downto 0);
   signal crc_corrupt         : std_logic := '0';
 
+  signal strobe_cnt_ref_sync : std_logic;
   signal in_strobe_arr       : std_logic_vector(c_nof_total_counts - 1 downto 0);
 
   signal hdr_fields_out_slv  : std_logic_vector(1023 downto 0);
@@ -248,6 +249,8 @@ begin
   in_strobe_arr(1) <= unpacked_sosi.valid;  -- count total nof Rx valid samples
   in_strobe_arr(2) <= crc_corrupt;  -- count total nof corrupted Rx packets
 
+  strobe_cnt_ref_sync <= unpacked_sosi.sync when g_use_dp_header else ref_sync;
+
   u_dp_strobe_total_count : entity dp_lib.dp_strobe_total_count
   generic map (
     g_nof_counts  => c_nof_total_counts,
@@ -258,7 +261,7 @@ begin
     dp_rst        => st_rst,
     dp_clk        => st_clk,
 
-    ref_sync      => ref_sync,
+    ref_sync      => strobe_cnt_ref_sync,
     in_strobe_arr => in_strobe_arr,
 
     mm_rst        => mm_rst,