The safest wish

Jon was on his bed, thinking about all the things he could do with the stone. He had seen what it could do after Karyn made her wish. To avoid any other incident, Jon decided to make a 100% safe wish: "I wish the stone would always grant my wishes the way I want them to be granted." The stone glowed a bit and Jon smiled. With this wish, there was no way his next wishes would get twisted.