diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index e81dc42e1..374356e35 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -361,7 +361,7 @@ class date:
     @classmethod
     def today(cls: Type[_S]) -> _S: ...
     @classmethod
-    def fromordinal(cls: Type[_S], n: int) -> _S: ...
+    def fromordinal(cls: Type[_S], __n: int) -> _S: ...
     @property
     def year(self) -> int: ...
     def replace(self, year: int = ..., month: int = ..., day: int = ...) -> date: ...