diff --git a/cbctdes/sim/makefile b/cbctdes/sim/vhdl/makefile
similarity index 100%
rename from cbctdes/sim/makefile
rename to cbctdes/sim/vhdl/makefile
diff --git a/cbctdes/sim/tb_cbctdes.tcl b/cbctdes/sim/vhdl/tb_cbctdes.tcl
similarity index 100%
rename from cbctdes/sim/tb_cbctdes.tcl
rename to cbctdes/sim/vhdl/tb_cbctdes.tcl
diff --git a/cbctdes/sim/tb_cbctdes.vhd b/cbctdes/sim/vhdl/tb_cbctdes.vhd
similarity index 100%
rename from cbctdes/sim/tb_cbctdes.vhd
rename to cbctdes/sim/vhdl/tb_cbctdes.vhd