1 files changed, 3 insertions, 3 deletions
diff --git a/app.go b/app.go
index f0f5068..8e9d8bb 100644
--- a/app.go
+++ b/app.go
@@ -35,13 +35,13 @@ type App struct {
 	FlowUnit mass.FlowRate
 
 	Comp    compressor.Compressor
-	CompImg image.Image
+	CompImg *image.NRGBA
 }
 
 func NewApp() (App, error) {
 	a := App{
 		Displacement: 2 * volume.Litre,
-		VolumeUnit:   volume.Litre,
+		VolumeUnit:   volume.CubicCentimetre,
 
 		Rpm: []int{2000},
 
@@ -91,7 +91,7 @@ func (a *App) SetCompressor(c compressor.Compressor) error {
 	}
 
 	b := j.Bounds()
-	m := image.NewRGBA(image.Rect(0, 0, b.Dx(), b.Dy()))
+	m := image.NewNRGBA(image.Rect(0, 0, b.Dx(), b.Dy()))
 	draw.Draw(m, m.Bounds(), j, b.Min, draw.Src)
 
 	a.Comp = c