diff --git a/libraries/dsp/filter/hdllib.cfg b/libraries/dsp/filter/hdllib.cfg
index 1d45a369213a5023c5ad24f202728f847f117fac..c39a1071a10ee3d09413b7c03d01756c847d82a2 100644
--- a/libraries/dsp/filter/hdllib.cfg
+++ b/libraries/dsp/filter/hdllib.cfg
@@ -16,3 +16,4 @@ test_bench_files =
     $UNB/Firmware/dsp/filter/tb/vhdl/tb_fil_ppf_single.vhd 
     $UNB/Firmware/dsp/filter/tb/vhdl/tb_fil_ppf_wide.vhd 
 
+modelsim_copy_files = src/hex hex