--- a/libupnpp/control/ohproduct.hxx
+++ b/libupnpp/control/ohproduct.hxx
@@ -56,6 +56,8 @@
 
     /** @ret 0 for success, upnp error else */
     int getSources(std::vector<Source>& sources);
+    int sourceIndex(int *index);
+    int setSourceIndex(int index);
 
 protected:
     /* My service type string */