"We were worth at least a draw, there's no doubt about it," he said after the 1-1 draw at Deepdale.
"I said to the lads at half-time that we needed to get forward a little bit quicker and it was a disappointing goal to lose.
"The players know that themselves. We work very hard on set pieces but that's the nature of football and sometimes it happens.
"But I've had all I can ask for from the players since I've been here and this certainly was another good performance."