diff --git a/stdlib/sys/__init__.pyi b/stdlib/sys/__init__.pyi
index 5867c9a9d510..880df4a996fe 100644
--- a/stdlib/sys/__init__.pyi
+++ b/stdlib/sys/__init__.pyi
@@ -264,9 +264,9 @@ def getrecursionlimit() -> int: ...
 def getsizeof(obj: object, default: int = ...) -> int: ...
 def getswitchinterval() -> float: ...
 def getprofile() -> ProfileFunction | None: ...
-def setprofile(profilefunc: ProfileFunction | None) -> None: ...
+def setprofile(function: ProfileFunction | None, /) -> None: ...
 def gettrace() -> TraceFunction | None: ...
-def settrace(tracefunc: TraceFunction | None) -> None: ...
+def settrace(function: TraceFunction | None, /) -> None: ...
 
 if sys.platform == "win32":
     # A tuple of length 5, even though it has more than 5 attributes.