Paycheck question

I forgot to record 8 hours of PTO on my time card. I was away on vacation and forgot to add that one day of PTO before I left. When I got back I fixed it but I think my time card was already submitted by then. My paycheck is short 8 hours and it's the weekend so I can't call HR. They have to pay me right? I'm assuming they will add 8 hours on to my next pay check....??