diff --git a/stdlib/_stat.pyi b/stdlib/_stat.pyi
index f91d408f5..60872ad88 100644
--- a/stdlib/_stat.pyi
+++ b/stdlib/_stat.pyi
@@ -64,19 +64,19 @@ UF_NODUMP: Literal[0x00000001]
 UF_NOUNLINK: Literal[0x00000010]
 UF_OPAQUE: Literal[0x00000008]
 
-def S_IMODE(mode: int) -> int: ...
-def S_IFMT(mode: int) -> int: ...
-def S_ISBLK(mode: int) -> bool: ...
-def S_ISCHR(mode: int) -> bool: ...
-def S_ISDIR(mode: int) -> bool: ...
-def S_ISDOOR(mode: int) -> bool: ...
-def S_ISFIFO(mode: int) -> bool: ...
-def S_ISLNK(mode: int) -> bool: ...
-def S_ISPORT(mode: int) -> bool: ...
-def S_ISREG(mode: int) -> bool: ...
-def S_ISSOCK(mode: int) -> bool: ...
-def S_ISWHT(mode: int) -> bool: ...
-def filemode(mode: int) -> str: ...
+def S_IMODE(mode: int, /) -> int: ...
+def S_IFMT(mode: int, /) -> int: ...
+def S_ISBLK(mode: int, /) -> bool: ...
+def S_ISCHR(mode: int, /) -> bool: ...
+def S_ISDIR(mode: int, /) -> bool: ...
+def S_ISDOOR(mode: int, /) -> bool: ...
+def S_ISFIFO(mode: int, /) -> bool: ...
+def S_ISLNK(mode: int, /) -> bool: ...
+def S_ISPORT(mode: int, /) -> bool: ...
+def S_ISREG(mode: int, /) -> bool: ...
+def S_ISSOCK(mode: int, /) -> bool: ...
+def S_ISWHT(mode: int, /) -> bool: ...
+def filemode(mode: int, /) -> str: ...
 
 if sys.platform == "win32":
     IO_REPARSE_TAG_SYMLINK: int