diff --git a/litellm/proxy/agent_endpoints/auth/agent_permission_handler.py b/litellm/proxy/agent_endpoints/auth/agent_permission_handler.py
index ea73d4634e3..4e022e48bb4 100644
--- a/litellm/proxy/agent_endpoints/auth/agent_permission_handler.py
+++ b/litellm/proxy/agent_endpoints/auth/agent_permission_handler.py
@@ -8,7 +8,9 @@ Follows the same pattern as MCP permission handling.
 import asyncio
 from collections.abc import Awaitable, Callable, Sequence
 from dataclasses import dataclass
-from typing import Final, TypeAlias, assert_never
+from typing import Final, TypeAlias
+
+from typing_extensions import assert_never
 
 from litellm._logging import verbose_logger
 from litellm.proxy._experimental.mcp_server.ui_session_utils import build_effective_auth_contexts