diff --git a/lib/aasm/persistence/base.rb b/lib/aasm/persistence/base.rb
index ce5fc3f..b097df4 100644
--- a/lib/aasm/persistence/base.rb
+++ b/lib/aasm/persistence/base.rb
@@ -83,6 +83,7 @@ module AASM
   end # Persistence
 
   class Base
+    # make sure to create a (named) scope for each state
     def state_with_scope(name, *args)
       state_without_scope(name, *args)
       unless @clazz.respond_to?(name)