diff --git a/third_party/2and3/chardet/universaldetector.pyi b/third_party/2and3/chardet/universaldetector.pyi
index 2c3250cc2..a81a7f1bb 100644
--- a/third_party/2and3/chardet/universaldetector.pyi
+++ b/third_party/2and3/chardet/universaldetector.pyi
@@ -25,7 +25,7 @@ class UniversalDetector(object):
     lang_filter: int
     logger: Logger
 
-    def __init__(self, lang_filter: int) -> None: ...
+    def __init__(self, lang_filter: int = ...) -> None: ...
     def reset(self) -> None: ...
     def feed(self, byte_str: bytes) -> None: ...
     def close(self) -> _FinalResultType: ...