The Argentine struck in victory over Celta Vigo yesterday.
Mourinho said: "He knows that with me, and in spite of the fact that forwards live for the goals, there are other aspects that are important. It's really complicated for a player to come off the bench and get into the dynamics of the game. They all have to go through intense defensive and offensive transitions and I took him off the bench at Camp Nou to stimulate him.
"He has to take that in stride, and when Higuaín's on the field, the goal will come. I'm relaxed about him and about Benzema."