Make sure you are using the most recent hibernate annotations. Ask on the hibernate forum and have a testcase if possible. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4093485#4093485 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4093485