diff --git a/LCS/Messaging/python/messaging/rpc_service.py b/LCS/Messaging/python/messaging/rpc_service.py
index 801dc03b33a0d525695a074635fd8de9a6bb4c13..d9422215cbd870dd420fe972c928d7991cd91d0d 100644
--- a/LCS/Messaging/python/messaging/rpc_service.py
+++ b/LCS/Messaging/python/messaging/rpc_service.py
@@ -75,7 +75,7 @@ class ServiceMessageHandler(AbstractMessageHandler):
         self.service_name = None
         self.exchange = None
         self.broker = None
-        self._reply_to_sender: ToBus = None
+        self._reply_to_sender = None
         self._subject_to_method_map = {}
         super(ServiceMessageHandler, self).__init__()