From 73928f3ccfa8c745928737cf08d1a647c0e5b7f2 Mon Sep 17 00:00:00 2001
From: Marco Feder <marco.feder@sissa.it>
Date: Sat, 25 Apr 2026 16:31:03 +0200
Subject: [PATCH] Make it compile with latest deal.II master

---
 include/mapping_box.h | 5 +++++
 source/mapping_box.cc | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/include/mapping_box.h b/include/mapping_box.h
index 9dbfee85..93f8d3cb 100644
--- a/include/mapping_box.h
+++ b/include/mapping_box.h
@@ -93,8 +93,13 @@ class MappingBox : public Mapping<dim, spacedim>
   virtual bool
   preserves_vertex_locations() const override;
 
+#if DEAL_II_VERSION_GTE(9, 8, 0)
+  virtual bool
+  is_compatible_with(const ReferenceCell<dim> &reference_cell) const override;
+#else
   virtual bool
   is_compatible_with(const ReferenceCell &reference_cell) const override;
+#endif
 
   /**
    * @name Mapping points between reference and real cells
diff --git a/source/mapping_box.cc b/source/mapping_box.cc
index d0b06887..ad3cf73e 100644
--- a/source/mapping_box.cc
+++ b/source/mapping_box.cc
@@ -130,8 +130,13 @@ MappingBox<dim, spacedim>::preserves_vertex_locations() const
 
 template <int dim, int spacedim>
 bool
+#if DEAL_II_VERSION_GTE(9, 8, 0)
+MappingBox<dim, spacedim>::is_compatible_with(
+  const ReferenceCell<dim> &reference_cell) const
+#else
 MappingBox<dim, spacedim>::is_compatible_with(
   const ReferenceCell &reference_cell) const
+#endif
 {
   Assert(dim == reference_cell.get_dimension(),
          ExcMessage("The dimension of your mapping (" +