Driverside visor problem 98 Altima

Hello,

I just purchased a 98 altima. I was driving on the freeway when the sun came out blazing (extremely bright). So I put down the visor to help shield some of the sunlight, and after about 15 minutes of driving it just fell!!!! So I had to fight the sun for the rest of my 40 minute drive. I was able to put it back in but it seems loose. Any ideas on how to get it to stay?!