Huntelaar struck his first goals for Milan in their 2-0 win at Catania.
Speaking to Milan's official website, Inzaghi said: "I am happy to have been useful to Klaas. You always need to be ready when you get the call and it makes me happy for Huntelaar because it doesn't often happen that I get an assist.
"We were told to play close together and I am happy because it's never easy to come on and be decisive. I will not take part in the next game because I am suspended and it always makes me unhappy when I am unable to contribute to the good of the team.
"I picked up several fouls in and around the area, then I committed one and got booked."