"The way it worked with Martin was when he was away, there was a lot of interest in him," Kean told the Lancashire Telegraph.
"I have sat down with Martin and said to him we want him to play. He is getting over a groin operation, is probably not going to be fit for the start of the season, but I have said we want to keep him and want to look at extending his contract. He smiled.
"I think there were clubs who enquired and we said 'not for sale'."