Fix mypy error

chardet · Jul 17, 2022 · fa4c1af · fa4c1af
1 parent 99cd852
commit fa4c1af
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/chardet/universaldetector.py b/chardet/universaldetector.py
@@ -329,7 +329,7 @@ def close(self) -> FinalResultDict:
                 # Rename legacy encodings with superset encodings if asked
                 if self.should_rename_legacy:
                     charset_name = self.LEGACY_MAP.get(
-                        charset_name.lower(), charset_name
+                        (charset_name or "").lower(), charset_name
                     )
                 self.result = {
                     "encoding": charset_name,