--- a/fsl/src/mist/common/shape.cpp	2021-07-15 10:44:27.000000000 +0000
+++ b/fsl/src/mist/common/shape.cpp	2021-11-24 14:12:38.684538565 +0000
@@ -354,7 +354,7 @@
     for (vtkIdType i = 0; i < cells->GetNumberOfIds(); i++)
     {
         vtkIdType npoints;
-        vtkIdType *points;
+        const vtkIdType *points;
 
         m_polyData->GetCellPoints(cells->GetId(i), npoints, points);