diff --git a/profile-widget/divecartesianaxis.cpp b/profile-widget/divecartesianaxis.cpp
index 533773072..0f0ad5fd0 100644
--- a/profile-widget/divecartesianaxis.cpp
+++ b/profile-widget/divecartesianaxis.cpp
@@ -370,10 +370,6 @@ void DepthAxis::settingsChanged()
 	unitSystem = prefs.units.length;
 }
 
-TimeAxis::TimeAxis(ProfileWidget2 *widget) : DiveCartesianAxis(widget)
-{
-}
-
 QColor TimeAxis::colorForValue(double) const
 {
 	return QColor(Qt::blue);
@@ -397,10 +393,6 @@ void TimeAxis::updateTicks(color_index_t color)
 	}
 }
 
-TemperatureAxis::TemperatureAxis(ProfileWidget2 *widget) : DiveCartesianAxis(widget)
-{
-}
-
 QString TemperatureAxis::textForValue(double value) const
 {
 	return QString::number(mkelvin_to_C((int)value));
diff --git a/profile-widget/divecartesianaxis.h b/profile-widget/divecartesianaxis.h
index 67b05a56a..c584299f7 100644
--- a/profile-widget/divecartesianaxis.h
+++ b/profile-widget/divecartesianaxis.h
@@ -88,7 +88,7 @@ slots:
 class TimeAxis : public DiveCartesianAxis {
 	Q_OBJECT
 public:
-	TimeAxis(ProfileWidget2 *widget);
+	using DiveCartesianAxis::DiveCartesianAxis;
 	void updateTicks(color_index_t color = TIME_GRID) override;
 private:
 	QString textForValue(double value) const override;
@@ -98,7 +98,7 @@ private:
 class TemperatureAxis : public DiveCartesianAxis {
 	Q_OBJECT
 public:
-	TemperatureAxis(ProfileWidget2 *widget);
+	using DiveCartesianAxis::DiveCartesianAxis;
 private:
 	QString textForValue(double value) const override;
 };