diff --git a/stdlib/2/_io.pyi b/stdlib/2/_io.pyi
index 0a0b6d0fc..3f1baab15 100644
--- a/stdlib/2/_io.pyi
+++ b/stdlib/2/_io.pyi
@@ -92,7 +92,7 @@ class _RawIOBase(_IOBase):
 class FileIO(_RawIOBase, BytesIO):  # type: ignore  # for __enter__
     mode = ...  # type: str
     closefd = ...  # type: bool
-    def __init__(self, file: str, mode: str = ...) -> None: ...
+    def __init__(self, file: str, mode: str = ..., closefd: bool = ...) -> None: ...
     def readinto(self, buffer: bytearray)-> int: ...
     def write(self, pbuf: str) -> int: ...