McInnes felt the sending off was unwarranted and it took the shine off a fifth win in six.
"He over-ran the ball and in his enthusiasm to make up for it he has just half-slipped - there were players slipping all over the place today," said McInnes
"He lost his footing and kind of lunged but he has pulled out at the death and almost stopped himself.
"I think a wee bit of understanding (was needed) from the referee.
"It was just youthful exuberance and desperation to play his part in the game."
Meanwhile McInnes has not given up hope of re-signing defender Michael Hector, who was given a huge ovation from the travelling support following his final game before his loan spell from Reading ends.
"Reading are in charge of the situation," said McInnes, who had defender Alan Tate, his new loan signing from Swansea, on the bench. "They have got their own issues with defenders, they have a few injuries.
"If Reading were better equipped, they see Michael staying here as a good thing.
"We will keep in touch with Reading, there are three-and-a-half weeks until the (transfer) window closes."