diff --git a/litellm/responses/main.py b/litellm/responses/main.py
index be5f890bbd6..950ea7063f5 100644
--- a/litellm/responses/main.py
+++ b/litellm/responses/main.py
@@ -281,7 +281,7 @@ async def aresponses_api_with_mcp(
             )
             
             # Extract MCP auth headers from the request to pass to MCP server
-            secret_fields = kwargs.get("secret_fields")
+            secret_fields: Optional[Dict[str, Any]] = kwargs.get("secret_fields")
             (
                 mcp_auth_header,
                 mcp_server_auth_headers,