diff --git a/stdlib/_winapi.pyi b/stdlib/_winapi.pyi
index ddea3d67ed14..3ccac7e6b7e6 100644
--- a/stdlib/_winapi.pyi
+++ b/stdlib/_winapi.pyi
@@ -1,4 +1,5 @@
 import sys
+from _typeshed import ReadableBuffer
 from collections.abc import Sequence
 from typing import Any, NoReturn, overload
 from typing_extensions import Literal, final
@@ -198,11 +199,11 @@ if sys.platform == "win32":
     def WaitForSingleObject(__handle: int, __milliseconds: int) -> int: ...
     def WaitNamedPipe(__name: str, __timeout: int) -> None: ...
     @overload
-    def WriteFile(handle: int, buffer: bytes, overlapped: Literal[True]) -> tuple[Overlapped, int]: ...
+    def WriteFile(handle: int, buffer: ReadableBuffer, overlapped: Literal[True]) -> tuple[Overlapped, int]: ...
     @overload
-    def WriteFile(handle: int, buffer: bytes, overlapped: Literal[False] = ...) -> tuple[int, int]: ...
+    def WriteFile(handle: int, buffer: ReadableBuffer, overlapped: Literal[False] = ...) -> tuple[int, int]: ...
     @overload
-    def WriteFile(handle: int, buffer: bytes, overlapped: int | bool) -> tuple[Any, int]: ...
+    def WriteFile(handle: int, buffer: ReadableBuffer, overlapped: int | bool) -> tuple[Any, int]: ...
     @final
     class Overlapped:
         event: int