The Dane gashed his leg in Leeds' FA Cup defeat against Hereford and, with the injury deemed to be quite severe, ex-Sheffield Wednesday 'keeper David Lucas will make his league debut at Whaddon Road.
Mark De Vries and Tore Andre Flo are also back in contention, but boss Dennis Wise will be without Leon Constantine, who looks set to be laid up for two-weeks with a foot injury.
"It's a small crack and he'll be out for a couple of weeks," said Wise. "We'll look at it, but Mark De Vries and Tore are back which is good. Casper's not fit. He's opened part of his knee up and he's got to be careful not to bend it."