That’s a strange statement to make. I just did two searches on the Cathecism of the Catholic Church and come up with nothing.
Hmmmm.
http://ccc.scborromeo.org.master.com/texis/master/search/?sufs=0&q=moslem&s=SS
http://ccc.scborromeo.org.master.com/texis/master/search/?sufs=0&q=islam&xsubmit=Search&s=SS
Another site
another search
Again — nothing.
841 The Church's relationship with the Muslims. "The plan of salvation also includes those who acknowledge the Creator, in the first place amongst whom are the Muslims; these profess to hold the faith of Abraham, and together with us they adore the one, merciful God, mankind's judge on the last day."330
http://ccc.scborromeo.org.master.com/texis/master/search/?sufs=0&q=muslims&s=SS