diff --git a/Makefile.in b/Makefile.in
index dc2fc59..45988b4 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -129,7 +129,7 @@ doinstall: $(SUBDIRS)
do \
(cd $$d; $(MAKE) DESTDIR=$(DESTDIR) install); \
done
- $(PYTHON) -c 'from compileall import *; compile_dir("$(DESTDIR)$(prefix)/Mailman", ddir="$(prefix)/Mailman")'
+ $(PYTHON) -c 'from compileall import *; compile_dir("$(DESTDIR)$(prefix)/Mailman", 20, "$(prefix)", 1)'
# Only run bin/update if we aren't installing in DESTDIR, as this
# means there are probably no lists to deal with, and it wouldn't