diff --git a/ietf/group/milestones.py b/ietf/group/milestones.py
index c79116ff3..c4928919b 100644
--- a/ietf/group/milestones.py
+++ b/ietf/group/milestones.py
@@ -383,7 +383,7 @@ def edit_milestones(request, acronym, group_type=None, milestone_set="current"):
     if group.uses_milestone_dates:
         forms.sort(key=lambda f: f.milestone.due if f.milestone else datetime.date.max)
     else:
-        forms.sort(key=lambda f: (f.milestone is None, f.milestone.order if f.milestone else None) )
+        forms.sort(key=lambda f: (f.milestone is None, f.milestone.order if f.milestone and f.milestone.order is not None else -1) )
 
     return render(request, 'group/edit_milestones.html',
                   dict(group=group,
diff --git a/ietf/group/tests_info.py b/ietf/group/tests_info.py
index 8470981cc..2a77ca5b7 100644
--- a/ietf/group/tests_info.py
+++ b/ietf/group/tests_info.py
@@ -1321,6 +1321,18 @@ class MilestoneTests(TestCase):
 
         self.assertEqual(group.charter.docevent_set.count(), events_before + 2) # 1 delete, 1 add
 
+    def test_edit_sort(self):
+        group = GroupFactory(uses_milestone_dates=False)
+        DatelessGroupMilestoneFactory(group=group,order=1)
+        DatelessGroupMilestoneFactory(group=group,order=0)
+        DatelessGroupMilestoneFactory(group=group,order=None)
+        url = urlreverse('ietf.group.milestones.edit_milestones;current', kwargs=dict(group_type=group.type_id, acronym=group.acronym))
+        login_testing_unauthorized(self, "secretary", url)
+        r = self.client.get(url)
+        self.assertEqual(r.status_code, 200)
+        q = PyQuery(r.content)
+        self.assertEqual([x.value for x in q('input[id^=id_m][id$=order]')], [None, '0', '1'])
+
 class DatelessMilestoneTests(TestCase):
     def test_switch_to_dateless(self):
         ad_role = RoleFactory(group__type_id='area',name_id='ad')