With a record of missing five in 13 for the Potters, Hughes is considering a switch.
But Walters said after missing at Liverpool: "Yes, it is hard when you miss, but I was big enough to take it.
"And if I'm big enough to take the plaudits when I score, I've got to be big enough to take it if I don't.
"After the game, I said sorry in the changing room to the lads and that's it.
"The manager hasn't said anything, but I wouldn't have a problem stepping up again.
"I am sure there are other lads wanting to take penalties, but if the opportunity came up again, I wouldn't shy away from it."
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