diff --git a/roles/mailman/templates/settings.py.j2 b/roles/mailman/templates/settings.py.j2
index a501e08690..8b90681f9f 100644
--- a/roles/mailman/templates/settings.py.j2
+++ b/roles/mailman/templates/settings.py.j2
@@ -281,7 +281,7 @@ COMPRESS_OFFLINE = True
 #
 HAYSTACK_CONNECTIONS = {
     'default': {
-        'ENGINE': 'haystack.backends.whoosh_backend.WhooshEngine',
+        'ENGINE': 'xapian_backend.XapianEngine',
         'PATH': "{{ mailman_webui_basedir }}/fulltext_index",
     },
 }