diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Hole_filling/Triangulate_hole_polyline.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Hole_filling/Triangulate_hole_polyline.h
index 0bb232eb66b..5e84ba9e694 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Hole_filling/Triangulate_hole_polyline.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Hole_filling/Triangulate_hole_polyline.h
@@ -15,6 +15,11 @@
 
 #include <CGAL/license/Polygon_mesh_processing/meshing_hole_filling.h>
 
+#ifdef CGAL_TRIANGULATE_FACES_DO_NOT_USE_CDT2
+# ifndef CGAL_HOLE_FILLING_DO_NOT_USE_CDT2
+#   define CGAL_HOLE_FILLING_DO_NOT_USE_CDT2
+# endif
+#endif
 
 #include <CGAL/value_type_traits.h>
 #ifndef CGAL_HOLE_FILLING_DO_NOT_USE_DT3
diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/triangulate_faces.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/triangulate_faces.h
index e0a7911c332..cb1d874f855 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/triangulate_faces.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/triangulate_faces.h
@@ -30,12 +30,6 @@
 #include <utility>
 #include <CGAL/array.h>
 
-#ifdef CGAL_TRIANGULATE_FACES_DO_NOT_USE_CDT2
-# ifndef CGAL_HOLE_FILLING_DO_NOT_USE_CDT2
-#   define CGAL_HOLE_FILLING_DO_NOT_USE_CDT2
-# endif
-#endif
-
 namespace CGAL {
 namespace Polygon_mesh_processing {
 namespace Triangulate_faces {