diff --git a/django-stubs/contrib/humanize/templatetags/humanize.pyi b/django-stubs/contrib/humanize/templatetags/humanize.pyi
index eb20268..92752fe 100644
--- a/django-stubs/contrib/humanize/templatetags/humanize.pyi
+++ b/django-stubs/contrib/humanize/templatetags/humanize.pyi
@@ -13,7 +13,7 @@ intword_converters: Tuple[Tuple[int, Callable]]
 
 def intword(value: Optional[Union[str, SupportsInt]]) -> Optional[Union[int, str]]: ...
 def apnumber(value: Optional[Union[str, SupportsInt]]) -> Optional[Union[int, str]]: ...
-def naturalday(value: Optional[Union[date, str]], arg: None = ...) -> Optional[str]: ...
+def naturalday(value: Optional[Union[date, str]], arg: Optional[str] = ...) -> Optional[str]: ...
 def naturaltime(value: datetime) -> str: ...
 
 class NaturalTimeFormatter: