diff --git a/lib/.document b/lib/.document
index 18c3b79def..34dcd7752b 100644
--- a/lib/.document
+++ b/lib/.document
@@ -25,7 +25,7 @@ logger.rb
 matrix.rb
 net
 observer.rb
-optionparser.rb
+optparse.rb
 pathname.rb
 pstore.rb
 rational.rb