diff --git a/src/judas_server/backend/client.py b/src/judas_server/backend/client.py
index 1c20fa2..14390fb 100644
--- a/src/judas_server/backend/client.py
+++ b/src/judas_server/backend/client.py
@@ -6,6 +6,7 @@ from __future__ import annotations
 import logging as lg
 import socket
 import time
+from typing import Any
 
 from judas_server.backend.client_status import ClientStatus
 
@@ -41,6 +42,8 @@ class Client:
         self.inbound: bytes = b""
         self.outbound: bytes = b""
 
+        self.initial_telemetry: dict[str, Any] | None = None
+
     def __str__(self) -> str:
         if self.addr:
             return f"Client({self.id} ({self.addr[0]}:{self.addr[1]}))"