--- a/upnpsoap.h
+++ b/upnpsoap.h
@@ -33,6 +33,9 @@
 #define PV_NAMESPACE \
 	" xmlns:pv=\"http://www.pv.com/pvns/\""
 
+#define FLAG_FREE_OBJECT_ID     0x40000000
+#define FLAG_ROOT_CONTAINER     0x80000000
+
 struct Response
 {
 	struct string_s *str;