diff --git a/litellm/llms/openai/common_utils.py b/litellm/llms/openai/common_utils.py
index 082764df2087..808998ddaf6f 100644
--- a/litellm/llms/openai/common_utils.py
+++ b/litellm/llms/openai/common_utils.py
@@ -135,7 +135,7 @@ def get_cached_openai_client(
         return _cached_client
 
     @staticmethod
-    def owns_wrapped_http_client(http_client: Optional[Union[httpx.Client, httpx.AsyncClient]]) -> bool:
+    def owns_wrapped_http_client(http_client: httpx.Client | httpx.AsyncClient | None) -> bool:
         """Whether litellm may close an SDK client built around ``http_client``.
 
         ``_get_async_http_client`` / ``_get_sync_http_client`` hand back