Manager Karl Robinson felt the result was more important than the performance after seeing his team move into the play-off places with a scrappy 1-0 victory at Hartlepool.
A drab opening first half ended with the game's first shot on target and the only goal.
Evan Horwood's attempt at chesting the ball back to his keeper fell short and Daniel Powell nipped in to round Scott Flinders and score from a tight angle.
"It was a battle, not a great deal of football was played," said Robinson. "They hit the bar and had chances to score. We didn't create anything, our wide men didn't create enough, but sometimes you have to grind them out and we did that.
"Our effort and workrate was great - the players are knackered. It's about winning, getting on the coach and getting home. You can't always be nice and pretty, sometimes it's about determination and digging in and we did that.
"I'll take this, I'm more than pleased with a win like this. We were outstanding on Tuesday and lost. One of the best performances in terms of passing and movement and performance, this time we didn't do any of that and won."