--- a/bc.mak	Thu Mar 10 02:01:13 2016 +0100
+++ b/bc.mak	Thu Mar 10 02:18:52 2016 +0100
@@ -42,7 +42,11 @@
 LOCALDEFINES=
 
 STCLOCALOPT=-package=$(PACKAGE) -I. $(LOCALINCLUDES) -headerDir=. $(STCLOCALOPTIMIZATIONS) $(STCWARNINGS) $(LOCALDEFINES) $(COMMONSYMBOLS) -varPrefix=$(LIBNAME)
+!if defined(USEMINGW64)
+LOCALLIBS=-L$(TOP)\librun\libffi\mingw_lib -lffi
+!else
 LOCALLIBS=
+!endif
 
 OBJS= $(COMMON_OBJS) $(WIN32_OBJS)
 
@@ -64,7 +68,7 @@
 test: $(TOP)\goodies\builder\reports\NUL
 	pushd $(TOP)\goodies\builder\reports & $(MAKE_BAT)
 	$(TOP)\goodies\builder\reports\report-runner.bat -D . -r Builder::TestReport -p $(PACKAGE)
-        
+
 clean::
 	del *.$(CSUFFIX)