diff --git a/desktop-widgets/tab-widgets/TabDiveExtraInfo.cpp b/desktop-widgets/tab-widgets/TabDiveExtraInfo.cpp
index caf7c99bf..c078b7e40 100644
--- a/desktop-widgets/tab-widgets/TabDiveExtraInfo.cpp
+++ b/desktop-widgets/tab-widgets/TabDiveExtraInfo.cpp
@@ -1,12 +1,13 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "TabDiveExtraInfo.h"
 #include "ui_TabDiveExtraInfo.h"
+#include "core/dive.h"
 #include "qt-models/divecomputerextradatamodel.h"
 
 TabDiveExtraInfo::TabDiveExtraInfo(QWidget *parent) :
 	TabBase(parent),
 	ui(new Ui::TabDiveExtraInfo()),
-	extraDataModel(new ExtraDataModel())
+	extraDataModel(new ExtraDataModel(this))
 {
 	ui->setupUi(this);
 	ui->extraData->setModel(extraDataModel);
@@ -19,11 +20,10 @@ TabDiveExtraInfo::~TabDiveExtraInfo()
 
 void TabDiveExtraInfo::updateData()
 {
-	extraDataModel->updateDive();
+	extraDataModel->updateDiveComputer(current_dc);
 }
 
 void TabDiveExtraInfo::clear()
 {
-	extraDataModel->updateDive();
+	extraDataModel->clear();
 }
-
diff --git a/qt-models/divecomputerextradatamodel.cpp b/qt-models/divecomputerextradatamodel.cpp
index e322a70a8..ef16a30f2 100644
--- a/qt-models/divecomputerextradatamodel.cpp
+++ b/qt-models/divecomputerextradatamodel.cpp
@@ -4,8 +4,7 @@
 #include "core/metrics.h"
 
 
-ExtraDataModel::ExtraDataModel(QObject *parent) : CleanerTableModel(parent),
-	rows(0)
+ExtraDataModel::ExtraDataModel(QObject *parent) : CleanerTableModel(parent)
 {
 	//enum Column {KEY, VALUE};
 	setHeaderDataStrings(QStringList() << tr("Key") << tr("Value"));
@@ -14,18 +13,15 @@ ExtraDataModel::ExtraDataModel(QObject *parent) : CleanerTableModel(parent),
 void ExtraDataModel::clear()
 {
 	beginResetModel();
-	rows = 0;
+	items.clear();
 	endResetModel();
 }
 
 QVariant ExtraDataModel::data(const QModelIndex &index, int role) const
 {
-	struct extra_data *ed = get_dive_dc(&displayed_dive, dc_number)->extra_data;
-	int i = -1;
-	while (ed && ++i < index.row())
-		ed = ed->next;
-	if (!ed)
+	if (!index.isValid() || index.row() > (int)items.size())
 		return QVariant();
+	const Item &item = items[index.row()];
 
 	switch (role) {
 	case Qt::FontRole:
@@ -35,9 +31,9 @@ QVariant ExtraDataModel::data(const QModelIndex &index, int role) const
 	case Qt::DisplayRole:
 		switch (index.column()) {
 		case KEY:
-			return ed->key;
+			return item.key;
 		case VALUE:
-			return ed->value;
+			return item.value;
 		}
 		return QVariant();
 	}
@@ -46,16 +42,16 @@ QVariant ExtraDataModel::data(const QModelIndex &index, int role) const
 
 int ExtraDataModel::rowCount(const QModelIndex&) const
 {
-	return rows;
+	return (int)items.size();
 }
 
-void ExtraDataModel::updateDive()
+void ExtraDataModel::updateDiveComputer(const struct divecomputer *dc)
 {
 	beginResetModel();
-	rows = 0;
-	struct extra_data *ed = get_dive_dc(&displayed_dive, dc_number)->extra_data;
+	struct extra_data *ed = dc ? dc->extra_data : nullptr;
+	items.clear();
 	while (ed) {
-		rows++;
+		items.push_back({ ed->key, ed->value });
 		ed = ed->next;
 	}
 	endResetModel();
diff --git a/qt-models/divecomputerextradatamodel.h b/qt-models/divecomputerextradatamodel.h
index ab78e4541..9af4028eb 100644
--- a/qt-models/divecomputerextradatamodel.h
+++ b/qt-models/divecomputerextradatamodel.h
@@ -4,6 +4,8 @@
 
 #include "cleanertablemodel.h"
 
+struct divecomputer;
+
 /* extra data model for additional dive computer data */
 class ExtraDataModel : public CleanerTableModel {
 	Q_OBJECT
@@ -17,10 +19,14 @@ public:
 	int rowCount(const QModelIndex &parent = QModelIndex()) const override;
 
 	void clear();
-	void updateDive();
+	void updateDiveComputer(const struct divecomputer *dc);
 
 private:
-	int rows;
+	struct Item {
+		QString key;
+		QString value;
+	};
+	std::vector<Item> items;
 };
 
 #endif