diff --git a/stdlib/2and3/msvcrt.pyi b/stdlib/2and3/msvcrt.pyi
index 7b4093081..bfbb67a28 100644
--- a/stdlib/2and3/msvcrt.pyi
+++ b/stdlib/2and3/msvcrt.pyi
@@ -8,7 +8,7 @@ LK_NBRLCK: int
 LK_RLCK: int
 LK_UNLCK: int
 
-def locking(fd: int, mode: int, nbytes: int) -> None: ...
+def locking(__fd: int, __mode: int, __nbytes: int) -> None: ...
 
-def get_osfhandle(file: int) -> int: ...
-def open_osfhandle(handle: int, flags: int) -> int: ...
+def get_osfhandle(__fd: int) -> int: ...
+def open_osfhandle(__handle: int, __flags: int) -> int: ...