--- a/plugins/extensions/pykrita/plugin/krita/sceditor/dockwidget.py
+++ b/plugins/extensions/pykrita/plugin/krita/sceditor/dockwidget.py
@@ -62,7 +62,7 @@ class DockWidgetTitleBarButton(QAbstract
         opt.icon = self.icon()
         opt.subControls = QStyle.SubControls()
         opt.activeSubControls = QStyle.SubControls()
-        opt.features = QStyleOptionToolButton.None
+        opt.features = QStyleOptionToolButton.None_
         opt.arrowType = Qt.NoArrow
         size = self.style().pixelMetric(QStyle.PM_SmallIconSize, None, self)
         opt.iconSize = QSize(size, size)