diff --git a/db/migrate/005_create_forums.rb b/db/migrate/005_create_forums.rb
index c7e40a720..905ac6677 100644
--- a/db/migrate/005_create_forums.rb
+++ b/db/migrate/005_create_forums.rb
@@ -1,5 +1,7 @@
 class CreateForums < ActiveRecord::Migration
   
+  # Declare the Forum model here so that the code below works even if you
+  # change app/models/forum.rb by (say) adding validations.
   class Forum < ActiveRecord::Base
   end