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--- a/upqo/ohvolume_qo.h
+++ b/upqo/ohvolume_qo.h
@@ -70,7 +70,7 @@
 
 signals:
     void volumeChanged(int);
-    void muteChanged(int);
+    void muteChanged(bool);
 
 private:
     UPnPClient::OHVLH m_srv;