diff --git a/stdlib/types.pyi b/stdlib/types.pyi
index a40b6280f..6928032f9 100644
--- a/stdlib/types.pyi
+++ b/stdlib/types.pyi
@@ -68,6 +68,9 @@ _V_co = TypeVar("_V_co", covariant=True)
 
 @final
 class _Cell:
+    if sys.version_info >= (3, 8):
+        def __init__(self, __contents: object = ...) -> None: ...
+
     __hash__: ClassVar[None]  # type: ignore[assignment]
     cell_contents: Any