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--- a/upmpd/conman.hxx
+++ b/upmpd/conman.hxx
@@ -21,6 +21,8 @@
 
 #include "libupnpp/device/device.hxx"
 
+using namespace UPnPP;
+
 class UpMpd;
 
 class UpMpdConMan : public UpnpService {