diff --git a/wrappers/simulink/munge_config.m b/wrappers/simulink/munge_config.m
index 702752d4..5f5d97ae 100644
--- a/wrappers/simulink/munge_config.m
+++ b/wrappers/simulink/munge_config.m
@@ -48,6 +48,7 @@ function munge_config(this_block)
   % -----------------------------
 
   this_block.addFileToLibrary(vhdl_file,'xil_defaultlib');
+  this_block.addFileToLibrary([filepath '/../../casper_flow_control/munge.vhd'],'casper_flow_control_lib');
   this_block.addFileToLibrary([filepath '/../../common_pkg/fixed_float_types_c.vhd'],'common_pkg_lib');
   this_block.addFileToLibrary([filepath '/../../common_pkg/fixed_pkg_c.vhd'],'common_pkg_lib');
   this_block.addFileToLibrary([filepath '/../../common_pkg/common_pkg.vhd'],'common_pkg_lib');