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 eebe7c947147a6b1ab1142f0905b0f1f1a662e5b..0a19eedd9ab56c066e343737563a991cc3f5974a 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
@@ -86,7 +86,7 @@ ARCHITECTURE wrap OF apertif_unb1_correlator_vis_offload IS
                                                                                    ( field_name_pad("id_marker_byte"                      ), "  ",  8, field_default(65) ), -- ASCII 'A'
                                                                                    ( field_name_pad("id_format_version"                   ), "  ",  8, field_default(2) ),  
                                                                                    ( field_name_pad("id_beamlet_index"                    ), "  ", 16, field_default(x"BEA1") ),
-                                                                                   ( field_name_pad("id_channel_index"                    ), "  ", 16, field_default(x"C0A1") ),
+                                                                                   ( field_name_pad("id_channel_index"                    ), "  ", 16, field_default(0) ),
                                                                                    ( field_name_pad("id_reserved"                         ), "  ", 16, field_default(0) ),
                                                                                    ( field_name_pad("id_timestamp"                        ), "  ", 64, field_default(0) ),
                                                                                    ( field_name_pad("flags_crc_error"                     ), "  ", 24, field_default(0) ),
@@ -102,7 +102,7 @@ ARCHITECTURE wrap OF apertif_unb1_correlator_vis_offload IS
                                                                                            "111111111101" &  -- IP  header fields: ip_src_addr from data path (others use MM default value).
                                                                                                    "1111" &  -- UDP header fields
 --                                                                                               "110010" &  -- ID  header fields: MM controlled: marker byte, format version, reserved. From data path: beamlet+channel index and timestamp.
-                                                                                                 "111110" &  -- ID FIXME: Now using defaults for beamlet+channel indices for testing.
+                                                                                                 "111010" &  -- ID FIXME: Now using defaults for beamlet index for testing.
                                                                                                "00111111";   -- Flag fields: crc_error and no_input_present from data path, others via MM.
 
   CONSTANT c_nof_hdr_words              : NATURAL := field_slv_len(c_hdr_field_arr)/c_tech_tse_data_w;