The striker is yet to hit the back of the net in the top flight â€“ although he has only recently returned from a long-term lay-off with a broken leg sustained in a collision with Blackburn's Gael Givet in January.
But Mackie maintains he is not worried about his lack of goals.
He told The Sun: "I'm not thinking about it, to be honest. I've set up a couple recently.
"In the role I'm playing I'm there to provide goals and hopefully scoring some as well.
"If I just keep doing the right things and the goals will come. I've got goals in me."