Whispering Wheat mistake

I messed up using the booster as priming sugar... I was re-reading a thread yesterday about using booster as the priming sugar and realized I did not put enough in! Since booster is only 80% fermentable sugars and 20% dextrins, I should have used 25% more of the booster in each bottle. I put one bottle in the refrigerator yesterday. I opened it today and it was noticeably under carbonated... I read this thread before I used the booster too, it just completely slipped my mind.