diff --git a/litellm/llms/openai/chat/guardrail_translation/handler.py b/litellm/llms/openai/chat/guardrail_translation/handler.py
index 0ce9d57a65f..f854cdb13d0 100644
--- a/litellm/llms/openai/chat/guardrail_translation/handler.py
+++ b/litellm/llms/openai/chat/guardrail_translation/handler.py
@@ -86,9 +86,9 @@ class OpenAIChatCompletionsHandler(BaseTranslation):
             if tool_calls_to_check:
                 inputs["tool_calls"] = tool_calls_to_check  # type: ignore
             if messages:
-                inputs["structured_messages"] = (
-                    messages  # pass the openai /chat/completions messages to the guardrail, as-is
-                )
+                inputs[
+                    "structured_messages"
+                ] = messages  # pass the openai /chat/completions messages to the guardrail, as-is
             # Pass tools (function definitions) to the guardrail
             tools = data.get("tools")
             if tools: