diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp
index 03afb29a7..9a67abb80 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp
@@ -122,13 +122,14 @@ void QNLWidget::updateRender()
 void QNLWidget::showEvent(QShowEvent *showEvent)
 {
 	QWidget::showEvent(showEvent);
-	if (isVisible())
-	{
-		m_driver->activate();
-		m_mainTimer->start(m_interval);
-	}
-	else
-		m_mainTimer->stop();
+	m_driver->activate();
+	m_mainTimer->start(m_interval);
+}
+
+void QNLWidget::hideEvent(QHideEvent *hideEvent)
+{
+	m_mainTimer->stop();
+	QWidget::hideEvent(hideEvent);
 }
 
 #if defined(NL_OS_WINDOWS)
diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.h b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.h
index c85f742f1..a54e6bb8a 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.h
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.h
@@ -96,6 +96,7 @@ private Q_SLOTS:
 
 protected:
 	virtual void showEvent(QShowEvent *showEvent);
+	virtual void hideEvent(QHideEvent *hideEvent);
 
 #if defined(NL_OS_WINDOWS)
 	virtual bool winEvent(MSG *message, long *result);