The defender is injured for the game whilst Rensing is on the bench...
Rensing was between the sticks when Bayern were crushed by Wolfsburg at the weekend and will start the match on the bench according to Bild.
Former German goalkeeper Butt has not played for the national team since 2003, but he was in goal in the last round when Bayern beat Sporting Lisbon 7-1.
Along with the change in goal, defender Phillip Lahm is out of the match after he failed a fitness test.
The German was set to mark Lionel Messi during the game but Christian Lell has instead started, prompting a reshuffle.
James Walker-Roberts, Goal.com