Stone Sour announced Tuesday that guitarist Jim Root will miss their upcoming tour so he can focus on a new Slipknot album.

Christian Martucci will fill in for Root.  The band broke the news on their Facebook page.  The band said, "It was a difficult decision, but as the fans have wanted another Stone Sour tour and Jim had responsibilities to the writing process with Slipknot, we feel this is the best decision where everyone wins."

A new Slipknot album will be the band's first since 2008's All Hope is Gone.  Since that time, Root has been spent a lot of time touring and recording with Stone Sour.

It is unclear why Root needs time away to write for a new Slipknot album while Corey Taylor, lead singer of both bands, does not.