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--- a/upmpd/upmpd.hxx
+++ b/upmpd/upmpd.hxx
@@ -17,6 +17,8 @@
 
 #ifndef _UPMPD_H_X_INCLUDED_
 #define _UPMPD_H_X_INCLUDED_
+
+using namespace UPnPProvider;
 
 class MPDCli;
 class MpdStatus;