diff --git a/channels/binding/websockets.py b/channels/binding/websockets.py
index 2cff4ec..56a1a6c 100644
--- a/channels/binding/websockets.py
+++ b/channels/binding/websockets.py
@@ -38,6 +38,7 @@ class WebsocketBinding(Binding):
             "action": action,
             "pk": instance.pk,
             "data": self.serialize_data(instance),
+            "model": self.model_label,
         }
         # Encode for the stream
         assert self.stream is not None