diff --git a/applications/apertif/designs/apertif_unb1_fn_bf_emu/src/vhdl/apertif_unb1_fn_bf_emu.vhd b/applications/apertif/designs/apertif_unb1_fn_bf_emu/src/vhdl/apertif_unb1_fn_bf_emu.vhd
index b200f7f20c3f1e25e33d588643d03c8514d86f00..0e220403b96f6a22b1da5ed4128b2078e9faa8b0 100644
--- a/applications/apertif/designs/apertif_unb1_fn_bf_emu/src/vhdl/apertif_unb1_fn_bf_emu.vhd
+++ b/applications/apertif/designs/apertif_unb1_fn_bf_emu/src/vhdl/apertif_unb1_fn_bf_emu.vhd
@@ -299,12 +299,12 @@ BEGIN
     g_sim             => g_sim,
     g_sim_level       => 1,
     g_nof_macs        => c_nof_10GbE_offload_streams,
+    g_direction       => "TX_ONLY",
     g_use_mdio        => TRUE,
     g_tx_fifo_fill    => c_pkt_len, 
     g_tx_fifo_size    => 2*c_pkt_len,
     g_rx_fifo_size    => 2*c_pkt_len
   )                      
-  
   PORT MAP (  
     -- Transceiver PLL reference clock
     tr_ref_clk_156    => SA_CLK,