Black, 28, is banned for the Scottish League One clash at Forfar on 20 January after picking up a sixth booking in 11 games during last week's 1-0 win at Airdrie.
The yellow card came as a result of him shoving an Airdrie player who had fouled him and McCoist feels his player has become a target for opponents.
"Ian comes in for a bit of heavy treatment," McCoist told the Rangers official website. "I said to him after the game at Airdrie that he can't react the way he reacted there and everybody appreciates that.
"Some of the challenges on him though are ridiculous and watching back that game, there were a couple that fell into that category.
"Ian's just one of these players for us. He has certainly been fouled and he gets his fair share of fouls on him.
"The reaction he gave at Airdrie and the booking he got was disappointing but there was part of me which could understand his frustration as the tackle on him was very poor."
McCoist, whose team won 2-0 at Stenhousemuir on Sunday, added: "Ian is doing well for us overall which is the main thing and he will be a miss for us in the Forfar game as he has given us great stability in the middle of the park with Nicky Law."