diff --git a/stdlib/asyncio/threads.pyi b/stdlib/asyncio/threads.pyi
index dbb15bb8f..ac3a5c56b 100644
--- a/stdlib/asyncio/threads.pyi
+++ b/stdlib/asyncio/threads.pyi
@@ -1,6 +1,7 @@
 from typing import Callable, TypeVar
 from typing_extensions import ParamSpec
 
+__all__ = ("to_thread",)
 _P = ParamSpec("_P")
 _R = TypeVar("_R")