However, North End manager Brown has told the told the club's official website: "David, as far as I am concerned, is on loan for one month and one month only.
"We hope that he will be back and on good form. I am delighted he played well on Saturday. The arrangement was that he goes on a month's loan.
"He is a member of our squad, a Preston North End player, a valuable one, our most expensive signing, so we are looking for him back after the month.
"We just wanted David to get a game, he wanted a game and it was good for him to get his confidence back with a change of scenery."