diff --git a/_tools/pygments2chroma.py b/_tools/pygments2chroma.py
index c2fff876f..11fc42082 100644
--- a/_tools/pygments2chroma.py
+++ b/_tools/pygments2chroma.py
@@ -191,7 +191,6 @@ def main():
         name=lexer_cls.name,
         regex_flags=lexer_cls.flags,
         upper_name=to_camel_case(re.sub(r'\W', '_', lexer_cls.name)),
-        upper_name=to_camel_case(re.sub(r'\W', '_', lexer_cls.name)),
         aliases=lexer_cls.aliases,
         filenames=lexer_cls.filenames,
         mimetypes=lexer_cls.mimetypes,