Index: head/math/vtk8/files/patch-Rendering_Qt_vtkQtLabelRenderStrategy.cxx
===================================================================
--- head/math/vtk8/files/patch-Rendering_Qt_vtkQtLabelRenderStrategy.cxx
+++ head/math/vtk8/files/patch-Rendering_Qt_vtkQtLabelRenderStrategy.cxx
@@ -0,0 +1,10 @@
+--- Rendering/Qt/vtkQtLabelRenderStrategy.cxx.orig	2020-05-28 17:13:13 UTC
++++ Rendering/Qt/vtkQtLabelRenderStrategy.cxx
+@@ -41,6 +41,7 @@
+ #include <QImage>
+ #include <QMap>
+ #include <QPainter>
++#include <QPainterPath>
+ #include <QPair>
+ #include <QPixmap>
+ #include <QTextDocument>