The Scotland international admits they should be doing better for the talent in Mark Hughes' squad.
"With the talent we've got in the dressing room, it doesn't matter who we're playing," said Mackie. "We just needed that little bit of belief, that little bit of confidence. It doesn't matter how good you are as a player, confidence goes a massive way. To come back from 2-0 down against a team packed with quality like Liverpool, it's got to give everyone belief in what we're trying to do. We've got a great chance of picking up results now."