diff --git a/lib/CPUs/MIPS/sim/tb_mips_top.fdo b/lib/CPUs/MIPS/sim/tb_mips_top.fdo
index faf26bd..202df0e 100644
--- a/lib/CPUs/MIPS/sim/tb_mips_top.fdo
+++ b/lib/CPUs/MIPS/sim/tb_mips_top.fdo
@@ -11,8 +11,11 @@ vcom -explicit  -93 "../../../misc/dpram_1w1r1c_sim.vhd"
 
 # FIFOS
 vcom -explicit  -93 "../../../FIFO/src/fifo_ctrl_pkg.vhd"
+vcom -explicit  -93 "../../../FIFO/src/gray_counter.vhd"
 vcom -explicit  -93 "../../../FIFO/src/fifo_sync_ctrl.vhd"
 vcom -explicit  -93 "../../../FIFO/src/fifo_sync.vhd"
+vcom -explicit  -93 "../../../FIFO/src/fifo_async_ctrl.vhd"
+vcom -explicit  -93 "../../../FIFO/src/fifo_async.vhd"
 
 # UART
 vcom -explicit  -93 "../../../uart/bbfifo_16x8.vhd"