@FastInfoset annotation on a web service does not work in JBoss WS CXF

Issue

• We are using EAP 5 with CXF installed. We have a web service which is also annotated with @org.jboss.ws.annotation.FastInfoset:

@WebService
@FastInfoset
public class MyWebServiceImpl implements MyWebService {
  ...
}

• However, the annotation @FastInfoset seems to be ignored. Even when the client requests a Fast Infoset message, the reply is still received in XML format.
• Running the same example works fine on EAP 5 without CXF installed, where we can see binary data exchanged.
• How should I do in order for Fast Infoset to work with CXF?