diff --git a/Examples/Filtering/GeometriesChangeSpatialReference.cxx b/Examples/Filtering/GeometriesChangeSpatialReference.cxx
index 0cb38e13ac112bbd4406c987809661fbc2452599..3d9cf26b810c3cb0179269ee8ff684c54513a387 100644
--- a/Examples/Filtering/GeometriesChangeSpatialReference.cxx
+++ b/Examples/Filtering/GeometriesChangeSpatialReference.cxx
@@ -47,6 +47,7 @@ struct ReprojectTransformationFunctor
     {
     m_osr .reset (static_cast<OGRSpatialReference*>(OSRNewSpatialReference(wkt.c_str())));
     }
+  //TODO: find a way to call it from DoProcessLayer
   void UpdateTransformation(OGRSpatialReference & in)
     {
     SetSpatialReferences(in, *m_osr);