The Ivory Coast international believes that he scarcely deserved last weekend's caution but has vowed not to let the decision affect his all-action style.
He told The Mirror: "I don't know why I was booked. I tried to take the ball but I didn't touch anyone. The referee made a decision though and I have to accept that.
"I think sometimes I get punished because people know I have a lot of bookings already in England. I think sometimes this happens. On Saturday I wasn't at fault but I got a booking.
"That's football though, I just need to concentrate on my game and not let it affect me. I think my discipline is better now than last season. I need to keep doing the same things and to continue to improve in that way."
The 29-year-old has been booked 41 times since joining Newcastle in 2010.