diff --git a/stdlib/termios.pyi b/stdlib/termios.pyi
index 9eecbf681..0c627f4b7 100644
--- a/stdlib/termios.pyi
+++ b/stdlib/termios.pyi
@@ -236,11 +236,11 @@ VWERASE: int
 XCASE: int
 XTABS: int
 
-def tcgetattr(fd: FileDescriptorLike) -> List[Any]: ...
-def tcsetattr(fd: FileDescriptorLike, when: int, attributes: _Attr) -> None: ...
-def tcsendbreak(fd: FileDescriptorLike, duration: int) -> None: ...
-def tcdrain(fd: FileDescriptorLike) -> None: ...
-def tcflush(fd: FileDescriptorLike, queue: int) -> None: ...
-def tcflow(fd: FileDescriptorLike, action: int) -> None: ...
+def tcgetattr(__fd: FileDescriptorLike) -> List[Any]: ...
+def tcsetattr(__fd: FileDescriptorLike, __when: int, __attributes: _Attr) -> None: ...
+def tcsendbreak(__fd: FileDescriptorLike, __duration: int) -> None: ...
+def tcdrain(__fd: FileDescriptorLike) -> None: ...
+def tcflush(__fd: FileDescriptorLike, __queue: int) -> None: ...
+def tcflow(__fd: FileDescriptorLike, __action: int) -> None: ...
 
 class error(Exception): ...