diff --git a/lib/optparse.rb b/lib/optparse.rb
index 7013b004b2..50d72f8a2e 100644
--- a/lib/optparse.rb
+++ b/lib/optparse.rb
@@ -1,4 +1,4 @@
-`# optparse library, not octopus.
+# optparse library, not octopus.
 
 =begin
 = Summary