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 bbc9e1b2ef461aa8a0dbb1dd07b0e79630fad306..178892aab5c1b7462caf0964555f04226b2dcb64 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
@@ -658,7 +658,7 @@ BEGIN
           PORT MAP(mm_rst, mm_clk, reg_mdio_2_mosi, reg_mdio_2_miso );
     u_mm_file_reg_dp_offload_rx_hdr_dat  :  mm_file GENERIC MAP(mmf_unb_file_prefix(g_sim_tb_index, g_sim_unb_nr, g_sim_node_nr) & "REG_DP_OFFLOAD_RX_HDR_DAT", c_sl0)
           PORT MAP(mm_rst, mm_clk, reg_dp_offload_rx_hdr_dat_mosi, reg_dp_offload_rx_hdr_dat_miso );
-    u_mm_file_reg_dp_offload_tx_hdr_dat  :  mm_file GENERIC MAP(mmf_unb_file_prefix(g_sim_tb_index, g_sim_unb_nr, g_sim_node_nr) & "REG_DP_OFFLOAD_TX_HDR_DAT", c_sl0)
+    u_mm_file_reg_dp_offload_tx_hdr_dat  :  mm_file GENERIC MAP(mmf_unb_file_prefix(g_sim_tb_index, g_sim_unb_nr, g_sim_node_nr) & "REG_DP_OFFLOAD_TX_HDR_DAT", c_sl1)
           PORT MAP(mm_rst, mm_clk, reg_dp_offload_tx_hdr_dat_mosi, reg_dp_offload_tx_hdr_dat_miso );
     u_mm_file_reg_tr_10gbe  :  mm_file GENERIC MAP(mmf_unb_file_prefix(g_sim_tb_index, g_sim_unb_nr, g_sim_node_nr) & "REG_TR_10GBE", c_sl0)
           PORT MAP(mm_rst, mm_clk, reg_tr_10gbe_mosi, reg_tr_10gbe_miso );