Mason's finish from outside the box was cancelled out by Gary Gardner but the former Cardiff City man was delighted to net for the first time since February 13.
The 24-year-old told the Express & Star: "It's a big relief. I'm not going to lie, it's been a while. I've been itching to get one, it was nice to see it go in. I've had a few chances in recent weeks which are the sort of chances I usually take.
"It's a monkey off my back and I can kick on and hopefully get another next week. It's not my typical sort of goal but I was really happy to score."
Mason has scored just three goals in 15 appearances since moving to the West Midlands outfit in January.