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--- a/upqo/renderingcontrol_qo.h
+++ b/upqo/renderingcontrol_qo.h
@@ -42,7 +42,7 @@
                 emit muteChanged(value);
             }
         }
-    void changed(const char */*nm*/, const char */*value*/)
+    void changed(const char * /*nm*/, const char * /*value*/)
         {
             //qDebug()<< "RDR: Changed: " << nm << " : " << value << " (char*)";
         }