Index: Makefile.pre.in
===================================================================
--- Makefile.pre.in	(revision 64417)
+++ Makefile.pre.in	(working copy)
@@ -814,7 +814,7 @@
 		ctypes ctypes/test ctypes/macholib idlelib idlelib/Icons \
 		distutils distutils/command distutils/tests $(XMLLIBSUBDIRS) \
 		setuptools setuptools/command setuptools/tests setuptools.egg-info \
-		curses $(MACHDEPS)
+		curses multiprocessing $(MACHDEPS)
 libinstall:	build_all $(srcdir)/Lib/$(PLATDIR)
 	@for i in $(SCRIPTDIR) $(LIBDEST); \
 	do \