diff --git a/omnibus/factories.py b/omnibus/factories.py
index 5ec6631..f332dd7 100644
--- a/omnibus/factories.py
+++ b/omnibus/factories.py
@@ -33,6 +33,9 @@ class GeneratedMessageConnection(MessageConnection, WebSocketHandler):
         authenticator_class = auth_class
         pubsub = pubsub_instance
 
+        def check_origin(self, origin):
+            return True
+
         def open(self):
             self.on_open(None)