diff --git a/mscore/playpanel.cpp b/mscore/playpanel.cpp
index ab2b9b87ab..1796f4989c 100644
--- a/mscore/playpanel.cpp
+++ b/mscore/playpanel.cpp
@@ -251,6 +251,7 @@ void PlayPanel::setRelTempo(qreal val)
 
 void PlayPanel::setGain(float gain)  // respond to gainChanged() SIGNAL from MasterSynthesizer
       {
+      Q_UNUSED(gain);
       const QSignalBlocker blockVolumeSpinBoxSignals(volSpinBox);
       volumeSlider->setValue(synti->gainAsDecibels());
       volLabel();
diff --git a/mscore/synthcontrol.cpp b/mscore/synthcontrol.cpp
index 90b25f9aa6..94291c96ef 100644
--- a/mscore/synthcontrol.cpp
+++ b/mscore/synthcontrol.cpp
@@ -116,6 +116,7 @@ SynthControl::SynthControl(QWidget* parent)
 // synthesizer has signalled a gain change - update the slider
 void SynthControl::setGain(float val)
       {
+      Q_UNUSED(val);
       gainSlider->setValue(synti->gainAsDecibels());
       }
 
diff --git a/mscore/synthcontrol.ui b/mscore/synthcontrol.ui
index 819dbb3af4..54e01119b2 100644
--- a/mscore/synthcontrol.ui
+++ b/mscore/synthcontrol.ui
@@ -459,7 +459,7 @@
   <tabstop>effectB</tabstop>
   <tabstop>masterTuning</tabstop>
   <tabstop>changeTuningButton</tabstop>
-  <tabstop>gain</tabstop>
+  <tabstop>gainSlider</tabstop>
   <tabstop>saveButton</tabstop>
   <tabstop>loadButton</tabstop>
   <tabstop>storeButton</tabstop>
diff --git a/synthesizer/msynthesizer.h b/synthesizer/msynthesizer.h
index e98a056122..35c212051a 100644
--- a/synthesizer/msynthesizer.h
+++ b/synthesizer/msynthesizer.h
@@ -47,7 +47,7 @@ class MasterSynthesizer : public QObject {
    public:
       static const int MAX_BUFFERSIZE = 8192;
       static const int MAX_EFFECTS = 2;
-      static constexpr float defaultGain = 0.1;  // -20dB
+      static constexpr float defaultGain = 0.1f;  // -20dB
 
    private:
       std::atomic<bool> lock1      { false };