diff --git a/litellm/llms/openai/common_utils.py b/litellm/llms/openai/common_utils.py
index ac84fbacf1..f9ba366cb5 100644
--- a/litellm/llms/openai/common_utils.py
+++ b/litellm/llms/openai/common_utils.py
@@ -163,7 +163,7 @@ class BaseOpenAILLM:
     @staticmethod
     def get_openai_client_initialization_param_fields(
         client_type: Literal["openai", "azure"]
-    ) -> list[str]:
+    ) -> List[str]:
         """Returns a list of fields that are used to initialize the OpenAI client"""
         import inspect