Pastore turned down the Rossoneri last summer.
"Sooner or later I will play in the Rossoneri shirt," he told Chi in an interview. "I'm sure of that.
"I have a splendid rapport with Vice-President Adriano Galliani and director general Ariedo Braida. I often dine with them, away from prying eyes, when I'm in Milan.
"I miss Italy and I love your country, while Milan are magic. First I want to win with PSG, but after that I will wear the Milan shirt."