diff --git a/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/mmm_apertif_unb1_correlator.vhd b/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/mmm_apertif_unb1_correlator.vhd
index b9c326aa2937444c0550b7b05750ecd10d5eeabd..9b82bd56e0e59f3ec09cb89af4f6bcaa6817b20f 100644
--- a/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/mmm_apertif_unb1_correlator.vhd
+++ b/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/mmm_apertif_unb1_correlator.vhd
@@ -520,6 +520,7 @@ ARCHITECTURE str OF mmm_apertif_unb1_correlator IS
       ram_st_sst_write_export                          : out std_logic;
       eth1g_reg_read_export                            : out std_logic;
       ram_diag_data_buffer_input_post_clk_export       : out std_logic;
+      reg_dp_xonoff_output_readdata_export             : in  std_logic_vector(31 downto 0) := (others => '0');
       reg_diag_data_buffer_mesh_reset_export           : out std_logic;
       ram_diag_data_buffer_input_post_writedata_export : out std_logic_vector(31 downto 0);
       eth1g_tse_write_export                           : out std_logic;
@@ -940,6 +941,7 @@ BEGIN
       reg_dp_xonoff_output_address_export              => reg_dp_xonoff_output_mosi.address(0),
       reg_dp_xonoff_output_clk_export                  => OPEN,
       reg_dp_xonoff_output_read_export                 => reg_dp_xonoff_output_mosi.rd,
+      reg_dp_xonoff_output_readdata_export             => reg_dp_xonoff_output_miso.rddata(c_word_w-1 DOWNTO 0),
       reg_dp_xonoff_output_reset_export                => OPEN,
       reg_dp_xonoff_output_write_export                => reg_dp_xonoff_output_mosi.wr,
       reg_dp_xonoff_output_writedata_export            => reg_dp_xonoff_output_mosi.wrdata(c_word_w-1 DOWNTO 0),