diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Corefinement/face_graph_utils.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Corefinement/face_graph_utils.h
index ef7db0585872..175e41063da5 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Corefinement/face_graph_utils.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Corefinement/face_graph_utils.h
@@ -1680,7 +1680,7 @@ void
 remove_patches(TriangleMesh& tm,
                const boost::dynamic_bitset<>& patches_to_remove,
                PatchContainer& patches,
-               const EdgeMarkMap& edge_mark_map)
+               EdgeMarkMap& edge_mark_map)
 {
   typedef boost::graph_traits<TriangleMesh> GT;
   typedef typename GT::face_descriptor face_descriptor;