diff --git a/custtypes.py b/custtypes.py
index bb57fc8..d991ba7 100644
--- a/custtypes.py
+++ b/custtypes.py
@@ -7,9 +7,11 @@ from typing import Required
 from collections.abc import Sequence
 from pathlib import Path, PurePath, PurePosixPath, PureWindowsPath, PosixPath, WindowsPath
 from enum import StrEnum, auto
+from io import TextIOBase, BufferedIOBase, RawIOBase
 
 ExecutedPath: Neotype = PosixPath | WindowsPath
 IdlePath: Neotype = PurePosixPath | PureWindowsPath
+File: Neotype = TextIOBase | BufferedIOBase | RawIOBase
 
 class RootFate(StrEnum):
     disposal = auto()