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--- a/upmpd/renderctl.cxx
+++ b/upmpd/renderctl.cxx
@@ -40,6 +40,8 @@
 #include "mpdcli.hxx"
 #include "upmpdutils.hxx"
 
+using namespace UPnPP;
+
 static const string 
 sTpRender("urn:schemas-upnp-org:service:RenderingControl:1");
 static const string sIdRender("urn:upnp-org:serviceId:RenderingControl");