2 files changed, 14 insertions, 3 deletions

diff --git a/src/mailman/utilities/importer.py b/src/mailman/utilities/importer.py
index 5b2be9742..baaa0e020 100644
--- a/src/mailman/utilities/importer.py
+++ b/src/mailman/utilities/importer.py
@@ -152,6 +152,7 @@ enabled: yes
 
 # Attributes in Mailman 2 which have a different type in Mailman 3.
 TYPES = dict(
+    allow_list_posts=bool,
     autorespond_owner=ResponseAction,
     autorespond_postings=ResponseAction,
     autorespond_requests=ResponseAction,
@@ -161,20 +162,20 @@ TYPES = dict(
     default_member_action=member_action_mapping,
     default_nonmember_action=nonmember_action_mapping,
     digest_volume_frequency=DigestFrequency,
+    encode_ascii_prefixes=bool,
     filter_action=filter_action_mapping,
     filter_extensions=list_members_to_unicode,
     filter_types=list_members_to_unicode,
     forward_unrecognized_bounces_to=UnrecognizedBounceDisposition,
+    include_rfc2369_headers=bool,
     moderator_password=unicode_to_string,
     newsgroup_moderation=NewsgroupModeration,
+    nntp_prefix_subject_too=bool,
     pass_extensions=list_members_to_unicode,
     pass_types=list_members_to_unicode,
     personalize=Personalization,
     preferred_language=check_language_code,
     reply_goes_to_list=ReplyToMunging,
-    allow_list_posts=bool,
-    include_rfc2369_headers=bool,
-    nntp_prefix_subject_too=bool,
     )
 
 
diff --git a/src/mailman/utilities/tests/test_import.py b/src/mailman/utilities/tests/test_import.py
index 308fa8af2..e6eb9344c 100644
--- a/src/mailman/utilities/tests/test_import.py
+++ b/src/mailman/utilities/tests/test_import.py
@@ -34,6 +34,7 @@ import unittest
 from datetime import timedelta, datetime
 from enum import Enum
 from pkg_resources import resource_filename
+from sqlalchemy.exc import IntegrityError
 from zope.component import getUtility
 
 from mailman.app.lifecycle import create_list
@@ -291,6 +292,15 @@ class TestBasicImport(unittest.TestCase):
         else:
             self.fail('Import21Error was not raised')
 
+    def test_encode_ascii_prefixes(self):
+        self._pckdict['encode_ascii_prefixes'] = 2
+        self.assertEqual(self._mlist.encode_ascii_prefixes, False)
+        try:
+            self._import()
+        except IntegrityError as e:
+            self.fail(e)
+        self.assertEqual(self._mlist.encode_ascii_prefixes, True)
+
 
 
 class TestArchiveImport(unittest.TestCase):