diff --git a/telegram/ext/filters.py b/telegram/ext/filters.py
index eb965e108..67e5d435d 100644
--- a/telegram/ext/filters.py
+++ b/telegram/ext/filters.py
@@ -215,7 +215,7 @@ class Filters(object):
     class _StatusUpdate(BaseFilter):
 
         def filter(self, message):
-            return bool(message.new_chat_member or message.left_chat_member
+            return bool(message.new_chat_members or message.left_chat_member
                         or message.new_chat_title or message.new_chat_photo
                         or message.delete_chat_photo or message.group_chat_created
                         or message.supergroup_chat_created or message.channel_chat_created
diff --git a/tests/test_filters.py b/tests/test_filters.py
index ecb173791..bb41e514b 100644
--- a/tests/test_filters.py
+++ b/tests/test_filters.py
@@ -121,9 +121,9 @@ class FiltersTest(BaseTest, unittest.TestCase):
     def test_filters_status_update(self):
         self.assertFalse(Filters.status_update(self.message))
 
-        self.message.new_chat_member = 'test'
+        self.message.new_chat_members = ['test']
         self.assertTrue(Filters.status_update(self.message))
-        self.message.new_chat_member = None
+        self.message.new_chat_members = None
 
         self.message.left_chat_member = 'test'
         self.assertTrue(Filters.status_update(self.message))