delete Python-ast.[ch] in distclean
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 7a69a6b..d7442a1 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -987,6 +987,7 @@
 distclean: clobber
 	-rm -f core Makefile Makefile.pre buildno config.status \
 		Modules/Setup Modules/Setup.local Modules/Setup.config
+	-rm -f $(AST_H) $(AST_C)
 	find $(srcdir) '(' -name '*.fdc' -o -name '*~' \
 			   -o -name '[@,#]*' -o -name '*.old' \
 			   -o -name '*.orig' -o -name '*.rej' \