diff --git a/src/judas_protocol/message.py b/src/judas_protocol/message.py
index 8548f59..8167e00 100644
--- a/src/judas_protocol/message.py
+++ b/src/judas_protocol/message.py
@@ -133,6 +133,7 @@ class Message:
             Message: The created ACK message.
         """
         return cls(
+            id_=None,
             category=Category.CONTROL,
             action=ControlAction.ACK,
             payload={"target_id": target_id},
@@ -148,6 +149,7 @@ class Message:
             Message: The created HELLO message.
         """
         return cls(
+            id_=None,
             category=Category.CONTROL,
             action=ControlAction.HELLO,
             payload={"mac": mac},