diff --git a/channels/binding/websockets.py b/channels/binding/websockets.py
index 14897ef..23c40d1 100644
--- a/channels/binding/websockets.py
+++ b/channels/binding/websockets.py
@@ -121,6 +121,7 @@ class WebsocketBindingWithMembers(WebsocketBinding):
         send_members = ['my_var', 'my_property', 'my_function']
     """
 
+    model = None
     send_members = []
 
     encoder = DjangoJSONEncoder()