diff --git a/Lib/_colorize.py b/Lib/_colorize.py
index 4f510a7141b3d2..766b2d8b80b1a4 100644
--- a/Lib/_colorize.py
+++ b/Lib/_colorize.py
@@ -155,7 +155,7 @@ def __iter__(self) -> Iterator[str]:
         return iter(self.__dataclass_fields__)
 
 
-@dataclass(frozen=True)
+@dataclass(frozen=True, kw_only=True)
 class Argparse(ThemeSection):
     usage: str = ANSIColors.BOLD_BLUE
     prog: str = ANSIColors.BOLD_MAGENTA