diff --git a/Makefile.pre.in b/Makefile.pre.in
index 8f91f88..f6844f9 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -837,7 +837,7 @@
 		distutils distutils/command distutils/tests $(XMLLIBSUBDIRS) \
 		multiprocessing multiprocessing/dummy \
 		lib-old \
-		curses $(MACHDEPS)
+		curses pydoc_data $(MACHDEPS)
 libinstall:	build_all $(srcdir)/Lib/$(PLATDIR)
 	@for i in $(SCRIPTDIR) $(LIBDEST); \
 	do \