diff --git a/mongoengine/base/document.py b/mongoengine/base/document.py
index 42a8bb4b..bb8d3a16 100644
--- a/mongoengine/base/document.py
+++ b/mongoengine/base/document.py
@@ -1082,8 +1082,8 @@ class BaseDocument(object):
         if field.choices and isinstance(field.choices[0], (list, tuple)):
             if value is None:
                 return None
-            sep = getattr(field, 'display_sep', u' ')
-            values = value if field.__class__.__name__ == 'ListField' else [value]
+            sep = getattr(field, 'display_sep', ' ')
+            values = value if field.__class__.__name__ in ('ListField', 'SortedListField') else [value]
             return sep.join([
                 dict(field.choices).get(val, val)
                 for val in values or []])
diff --git a/tests/fields/fields.py b/tests/fields/fields.py
index 336e116c..1dc25d12 100644
--- a/tests/fields/fields.py
+++ b/tests/fields/fields.py
@@ -921,7 +921,7 @@ class FieldTest(MongoDBTestCase):
     def test_list_validation(self):
         """Ensure that a list field only accepts lists with valid elements."""
         AccessLevelChoices = (
-            ('a', u'Administrator'),
+            ('a', u'Administration'),
             ('b', u'Manager'),
             ('c', u'Staff'),
         )
@@ -938,7 +938,7 @@ class FieldTest(MongoDBTestCase):
             tags = ListField(StringField())
             authors = ListField(ReferenceField(User))
             generic = ListField(GenericReferenceField())
-            access_list = ListField(required=False, default=[], choices=AccessLevelChoices, display_sep=u',')
+            access_list = ListField(choices=AccessLevelChoices, display_sep=', ')
 
         User.drop_collection()
         BlogPost.drop_collection()
@@ -965,7 +965,7 @@ class FieldTest(MongoDBTestCase):
         post.access_list = ['a', 'b']
         post.validate()
 
-        self.assertEqual(post.get_access_list_display(), u'Administrator,Manager')
+        self.assertEqual(post.get_access_list_display(), u'Administration, Manager')
 
         post.comments = ['a']
         self.assertRaises(ValidationError, post.validate)