diff --git a/lib/fx/command_recorder.rb b/lib/fx/command_recorder.rb
index 161fdc9..a2ec0aa 100644
--- a/lib/fx/command_recorder.rb
+++ b/lib/fx/command_recorder.rb
@@ -100,5 +100,6 @@ def options_for_revert
         end
       end
     end
+    private_constant :Arguments
   end
 end