diff --git a/litellm/proxy/agent_endpoints/managed_identity.py b/litellm/proxy/agent_endpoints/managed_identity.py
index 1c8d8344204..83985815c07 100644
--- a/litellm/proxy/agent_endpoints/managed_identity.py
+++ b/litellm/proxy/agent_endpoints/managed_identity.py
@@ -1,5 +1,5 @@
 from collections.abc import Mapping
-from typing import Final
+from typing import Final, NoReturn
 
 from fastapi import HTTPException
 
@@ -48,5 +48,5 @@ def classify_agent_subject(
     return AgentSubject(kind="application", oid=oid, mode="autonomous")
 
 
-def raise_identity_failure(failure: AgentIdentityFailure, status_code: int = 403) -> None:
+def raise_identity_failure(failure: AgentIdentityFailure, status_code: int = 403) -> NoReturn:
     raise HTTPException(503 if failure.code == "policy_unavailable" else status_code, failure.message)