Graham Westley felt his Preston players did a professional job in securing their place in the FA Cup third round on Saturday.
Jeffrey Monakana and Stuart Beavon sent the Lilywhites through 2-0 against Gillingham, who saw Deon Burton fail from the penalty spot at Deepdale.
"The job was to get into the third round and in the end that's the most important thing," said Westley.
"It was professional enough. There were periods of the game up until we scored goal when we played some good football.
"We went ahead and, as we've done several times, we sat off the game and allowed them to come into it. Our second goal was a little bit against the run of play.
"The side can be a bit hesitant when we get on a lead but second half we went out to consolidate, play on the counter and build on our lead but it was a very difficult start.
"They got that early penalty and had they scored it, it could have been a different game.
"Beavon works like a Trojan. In some respects that's his biggest problem. He's such a hard-working player, he takes himself out of goalscoring areas so often."