diff --git a/profile-widget/tankitem.cpp b/profile-widget/tankitem.cpp
index 24c13aed6..2a8449827 100644
--- a/profile-widget/tankitem.cpp
+++ b/profile-widget/tankitem.cpp
@@ -31,6 +31,7 @@ TankItem::TankItem(QObject *parent) :
 	trimixGradient.setColorAt(1.0, red);
 	trimix = trimixGradient;
 	air = blue;
+	hAxis = Q_NULLPTR;
 	memset(&diveCylinderStore, 0, sizeof(diveCylinderStore));
 }
 
diff --git a/profile-widget/tankitem.h b/profile-widget/tankitem.h
index 91f19dfde..713bc92dc 100644
--- a/profile-widget/tankitem.h
+++ b/profile-widget/tankitem.h
@@ -28,7 +28,6 @@ private:
 	void createBar(qreal x, qreal w, struct gasmix *gas);
 	DivePlotDataModel *dataModel;
 	DiveCartesianAxis *hAxis;
-	int hDataColumn;
 	struct dive diveCylinderStore;
 	struct plot_data *pInfoEntry;
 	int pInfoNr;