--- src/waveform/renderers/waveformrendererhsv.cpp
+++ src/waveform/renderers/waveformrendererhsv.cpp
@@ -69,7 +69,7 @@ void WaveformRendererHSV::draw(QPainter*
     allGain *= factory->getVisualGain(::WaveformWidgetFactory::All);
 
     // Save HSV of waveform color
-    double h,s,v;
+    qreal h,s,v;
 
     // Get base color of waveform in the HSV format (s and v isn't use)
     m_pColors->getLowColor().getHsvF(&h,&s,&v);
--- src/waveform/renderers/waveformsignalcolors.cpp
+++ src/waveform/renderers/waveformsignalcolors.cpp
@@ -68,14 +68,14 @@ void WaveformSignalColors::fallBackFromS
     qWarning() << "WaveformSignalColors::fallBackFromSignalColor - " \
                   "skin do not provide low/mid/high signal colors";
 
-    double h,s,l,a;
+    qreal h,s,l,a;
     m_signalColor.getHslF(&h,&s,&l,&a);
 
     const double analogousAngle = 1.0/12.0;
 
     if( s < 0.1) // gray
     {
-        const double sMax = 1.0 - h;
+        const qreal sMax = 1.0 - h;
         m_lowColor.setHslF(h,s,l);
         m_midColor.setHslF(h,s+sMax*0.2,l);
         m_highColor.setHslF(h,s+sMax*0.4,l);
@@ -84,28 +84,28 @@ void WaveformSignalColors::fallBackFromS
     {
         if( l < 0.1) // ~white
         {
-            const double lMax = 1.0 - l;
+            const qreal lMax = 1.0 - l;
             m_lowColor.setHslF(h,s,l);
             m_midColor.setHslF(h,s,l+lMax*0.2);
             m_highColor.setHslF(h,s,l+lMax*0.4);
         }
         else if( l < 0.5)
         {
-            const double lMax = 1.0 - l;
+            const qreal lMax = 1.0 - l;
             m_lowColor.setHslF(h,s,l);
             m_midColor.setHslF(stableHue(h-analogousAngle*0.3),s,l+lMax*0.1);
             m_highColor.setHslF(stableHue(h+analogousAngle*0.3),s,l+lMax*0.4);
         }
         else if ( l < 0.9)
         {
-            const double lMin = l;
+            const qreal lMin = l;
             m_lowColor.setHslF(h,s,l);
             m_midColor.setHslF(stableHue(h-analogousAngle*0.3),s,l-lMin*0.1);
             m_highColor.setHslF(stableHue(h+analogousAngle*0.3),s,l-lMin*0.4);
         }
         else // ~black
         {
-            const double lMin = l;
+            const qreal lMin = l;
             m_lowColor.setHslF(h,s,l);
             m_midColor.setHslF(h,s,l-lMin*0.2);
             m_highColor.setHslF(h,s,l-lMin*0.4);