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--- a/libupnpp/control/service.hxx
+++ b/libupnpp/control/service.hxx
@@ -41,7 +41,7 @@
     virtual void changed(const char *nm, const char *val) = 0;
     // Used for track metadata (parsed as content directory entry). Not always
     // needed.
-    virtual void changed(const char *nm, UPnPDirContent meta) {};
+    virtual void changed(const char *nm, UPnPDirObject meta) {};
 };
 
 typedef