You already have the JSF libs included in JBoss AS 4.2.x, so no, you do not need them in your war. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4141459#4141459 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4141459