diff --git a/stdlib/3/io.pyi b/stdlib/3/io.pyi
index d3cc6948b499..b6da189e87d0 100644
--- a/stdlib/3/io.pyi
+++ b/stdlib/3/io.pyi
@@ -146,8 +146,7 @@ class TextIOBase(IOBase):
     def seek(self, offset: int, whence: int = ...) -> int: ...
     def tell(self) -> int: ...
 
-# TODO should extend from TextIOBase
-class TextIOWrapper(TextIO):
+class TextIOWrapper(TextIOBase):
     line_buffering: bool
     # TODO uncomment after fixing mypy about using write_through
     # def __init__(self, buffer: IO[bytes], encoding: str = ...,