diff --git a/src/Make_bc5.mak b/src/Make_bc5.mak
index 3eb0869..8172c1f 100644
--- a/src/Make_bc5.mak
+++ b/src/Make_bc5.mak
@@ -1006,10 +1006,10 @@
 	$(PERL)\bin\perl.exe $(PERL)\lib\ExtUtils\xsubpp -prototypes -typemap \
 	    $(PERL)\lib\ExtUtils\typemap if_perl.xs > $@
 
-$(OBJDIR)\if_python.obj: if_python.c python.lib
+$(OBJDIR)\if_python.obj: if_python.c if_py_both.h python.lib
 	$(CC) -I$(PYTHON)\include $(CCARG) $(CC1) $(CC2)$@ -pc if_python.c
 
-$(OBJDIR)\if_python3.obj: if_python3.c python3.lib
+$(OBJDIR)\if_python3.obj: if_python3.c if_py_both.h python3.lib
 	$(CC) -I$(PYTHON3)\include $(CCARG) $(CC1) $(CC2)$@ -pc if_python3.c
 
 $(OBJDIR)\if_ruby.obj: if_ruby.c ruby.lib