diff --git a/docs_src/query_params_str_validations/tutorial006d_an_py310.py b/docs_src/query_params_str_validations/tutorial006d_an_py310.py
index 94af45722..6e58cc8f0 100644
--- a/docs_src/query_params_str_validations/tutorial006d_an_py310.py
+++ b/docs_src/query_params_str_validations/tutorial006d_an_py310.py
@@ -1,4 +1,5 @@
-from typing import Annotated, Optional, Union
+from typing import Optional, Union
+from typing_extensions import Annotated
 
 from fastapi import FastAPI, Query
 from pydantic import BeforeValidator