diff --git a/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator_vis_offload.vhd b/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator_vis_offload.vhd
index 04345ab16e4d8793a484638c29e7d7fa44ff74fe..80e5facb7a2e4617295bc6153e15a44fc92e0f69 100644
--- a/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator_vis_offload.vhd
+++ b/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator_vis_offload.vhd
@@ -288,7 +288,9 @@ ARCHITECTURE wrap OF apertif_unb1_correlator_vis_offload IS
 --  CONSTANT c_nof_flags_per_input        : NATURAL := 8;--FIXME
   CONSTANT c_nof_flags_per_input        : NATURAL := 1;
 
-  CONSTANT c_hdr_field_id_ovr_init      : STD_LOGIC_VECTOR(c_nof_id_fields-1 DOWNTO 0)       := "110010";   -- MM controlled: marker byte, format version, reserved. From data path: beamlet+channel index and timestamp.
+  CONSTANT c_hdr_field_id_ovr_init      : STD_LOGIC_VECTOR(c_nof_id_fields-1 DOWNTO 0)         := "111110"; --FIXME
+--  CONSTANT c_hdr_field_id_ovr_init      : STD_LOGIC_VECTOR(c_nof_id_fields-1 DOWNTO 0)       := "110010";   -- MM controlled: marker byte, format version, reserved. From data path: beamlet+channel index and timestamp.
+
 --  CONSTANT c_hdr_field_flags_ovr_init   : STD_LOGIC_VECTOR(c_nof_flags_per_input-1 DOWNTO 0) := "11111100"; -- Flag fields 7..2 are MM controlled, fields 1..0 come from the data path. --FIXME
   CONSTANT c_hdr_field_flags_ovr_init   : STD_LOGIC_VECTOR(c_nof_flags_per_input-1 DOWNTO 0) := "1"; -- All 8 flags combined in one register for now.