diff --git a/examples/rest-example/project-conf.h b/examples/rest-example/project-conf.h
index 43528a30c..e55e28419 100644
--- a/examples/rest-example/project-conf.h
+++ b/examples/rest-example/project-conf.h
@@ -26,22 +26,26 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: project-conf.h,v 1.1 2010/10/28 13:11:08 doganyazar Exp $
+ *
  */
 
 #ifndef __PROJECT_RPL_WEB_CONF_H__
 #define __PROJECT_RPL_WEB_CONF_H__
 
-#undef QUEUEBUF_CONF_NUM
+#ifndef QUEUEBUF_CONF_NUM
 #define QUEUEBUF_CONF_NUM          6
+#endif
 
-#undef UIP_CONF_BUFFER_SIZE
+#ifndef UIP_CONF_BUFFER_SIZE
 #define UIP_CONF_BUFFER_SIZE    140
+#endif
 
-#undef UIP_CONF_RECEIVE_WINDOW
+#ifndef UIP_CONF_RECEIVE_WINDOW
 #define UIP_CONF_RECEIVE_WINDOW  60
+#endif
 
-#undef WEBSERVER_CONF_CFS_CONNS
+#ifndef WEBSERVER_CONF_CFS_CONNS
 #define WEBSERVER_CONF_CFS_CONNS 2
+#endif
 
 #endif /* __PROJECT_RPL_WEB_CONF_H__ */