diff --git a/qglengine/glwidget.cpp b/qglengine/glwidget.cpp
index 980757f..6cb8d82 100644
--- a/qglengine/glwidget.cpp
+++ b/qglengine/glwidget.cpp
@@ -5,7 +5,7 @@
 
 GLWidget::GLWidget(QWidget *parent) : QWidget(parent) {
 	view_ = new QGLView();
-	view_->setFlag(Qt::FramelessWindowHint);
+	view_->setFlags(windowFlags() | Qt::FramelessWindowHint);
 	container = QWidget::createWindowContainer(view_, this);
 	lay = new QVBoxLayout(this);
 	lay->addWidget(container);
diff --git a/qglengine/openglwindow.cpp b/qglengine/openglwindow.cpp
index f6fa56c..3768a84 100644
--- a/qglengine/openglwindow.cpp
+++ b/qglengine/openglwindow.cpp
@@ -10,7 +10,7 @@ OpenGLWindow::OpenGLWindow(QWindow *parent)
 	, m_context(nullptr)
 	, m_device(nullptr)
 {
-	setFlag(Qt::FramelessWindowHint);
+	setFlags(flags() | Qt::FramelessWindowHint);
 	setSurfaceType(QWindow::OpenGLSurface);
 	QSurfaceFormat format = QSurfaceFormat::defaultFormat();
 //	qDebug() << format;