As a swift action, you can imbue your weapons with a fraction of your power. For 1 round, your weapons deal +1 damage and are treated as magic for the purpose of overcoming damage reduction. For every five caster levels you possess, this bonus increases by +1, to a maximum of +5 at 20th level.
By my reading, this is an untyped bonus. Am I wrong, or does it stack with weapon enhancements (and all other bonuses) to attack and defence?