Nairn was in East Lansing for an official visit this weekend. He has already taken officials to Oklahoma and Minnesota and is scheduled to be in Bloomington next weekend.
Nairn said he will still take his visit to Indiana next weekend, but admitted the Spartans will also be a player now.
"They're equal with everyone else," Nairn told AllHoosiers.com.
Nairn said late last week he planned to take his visit to IU and make a decision two or three days later. It's unclear whether Michigan State's involvement has changed Nairn's timetable at all.
Nairn is the 23rd-ranked point guard in the 2014 class, but he's regarded as a tough leader who has the ability to shoot the ball when he looks for his shot.
Indiana coach Tom Crean had an in-home visit with Nairn last week.
"It was great," Nairn said last week. "He said I would be the best leader in the Big Ten. He told me I would play well in their offense and could play with Yogi [Ferrell].
"Also, he said I would take their team from tough to nasty."