diff --git a/qt-ui/simplewidgets.cpp b/qt-ui/simplewidgets.cpp
index 8a808d2a2..edee3ec49 100644
--- a/qt-ui/simplewidgets.cpp
+++ b/qt-ui/simplewidgets.cpp
@@ -667,7 +667,7 @@ void MultiFilter::closeFilter()
 #include <QDebug>
 #include <QShowEvent>
 
-LocationInformationWidget::LocationInformationWidget(QWidget *parent) : QGroupBox(parent)
+LocationInformationWidget::LocationInformationWidget(QWidget *parent) : QGroupBox(parent), modified(false)
 {
 	ui.setupUi(this);
 	ui.diveSiteMessage->setText("You are editing the Dive Site");
@@ -755,3 +755,19 @@ void LocationInformationWidget::rejectChanges()
 void LocationInformationWidget::showEvent(QShowEvent *ev) {
 	ui.diveSiteMessage->setCloseButtonVisible(false);
 }
+
+void LocationInformationWidget::markChangedWidget(QWidget *w)
+{
+	QPalette p;
+	qreal h, s, l, a;
+	enableEdition();
+	qApp->palette().color(QPalette::Text).getHslF(&h, &s, &l, &a);
+	p.setBrush(QPalette::Base, (l <= 0.3) ? QColor(Qt::yellow).lighter() : (l <= 0.6) ? QColor(Qt::yellow).light() : /* else */ QColor(Qt::yellow).darker(300));
+	w->setPalette(p);
+	modified = true;
+}
+
+void LocationInformationWidget::enableEdition()
+{
+
+}
diff --git a/qt-ui/simplewidgets.h b/qt-ui/simplewidgets.h
index d0cb60508..f9e4b466d 100644
--- a/qt-ui/simplewidgets.h
+++ b/qt-ui/simplewidgets.h
@@ -230,13 +230,15 @@ public slots:
 
 	void setLocationId(uint32_t uuid);
 	void updateGpsCoordinates(void);
-
+	void markChangedWidget(QWidget *w);
+	void enableEdition();
 signals:
 	void informationManagementEnded();
 
 private:
 	struct dive_site *currentDs;
 	Ui::LocationInformation ui;
+	bool modified;
 };
 
 bool isGnome3Session();