It had been speculated that the Italian could alter his formation in the coming season in order to fit new signing James Rodriguez into the XI.
However, Ancelotti has confirmed that he will continue with a 4-3-3 system.
"I'm not thinking of changing the system, we'll carry on with last year's system. In any one game we might change things, but just for that particular moment in that particular game. The idea is the same as last year's," he told reporters at a press conference.
Madrid face Atletico Madrid in the first leg of the Spanish Super Cup on Tuesday.