diff --git a/litellm/litellm_core_utils/model_param_helper.py b/litellm/litellm_core_utils/model_param_helper.py
index 09a2c15a77..ebe3ce93fc 100644
--- a/litellm/litellm_core_utils/model_param_helper.py
+++ b/litellm/litellm_core_utils/model_param_helper.py
@@ -123,7 +123,7 @@ class ModelParamHelper:
 
         This follows the OpenAI API Spec
         """
-        return set(TranscriptionCreateParams.__annotations__.keys())
+        return set(TranscriptionCreateParams.__dict__.keys())
 
     @staticmethod
     def _get_exclude_kwargs() -> Set[str]: