diff --git a/litellm/router.py b/litellm/router.py
index 7fe5c2fb94b..b16a84e11af 100644
--- a/litellm/router.py
+++ b/litellm/router.py
@@ -619,7 +619,7 @@ class Router:
     @staticmethod
     def _create_redis_cache(
         cache_config: Dict[str, Any]
-    ) -> RedisCache | RedisClusterCache:
+    ) -> Union[RedisCache, RedisClusterCache]:
         if cache_config.get("startup_nodes"):
             return RedisClusterCache(**cache_config)
         else: