You should have this class in server//lib/hibernate-annotations.jar. (Per default 4.2 installation) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4073028#4073028 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4073028