It will probably be really good... Assuming the aroma hop addition was only going to be for a 5-10 minute boil time, you wouldn't have gotten all that much in the IBU level from the hops. Basically, you just had an accidental dry hop incident..
Taste the brew in a couple of weeks (on the yeast) and decide if you need more hop aroma/flavor in it... If so, add another ounce (or so) a week (maybe two) before you bottle it up... Just means you might have more trub in the primary this way. No biggie there. You might want to get some whole hops to dry hop with later... Hopefully some of the people that do this will post up (I've not done it yet)...
What did you brew?
Of course, you will have to post up how it comes out with the accidental dry hopping...