diff --git a/Basic_viewer/doc/Basic_viewer/CGAL/Graphics_scene_options.h b/Basic_viewer/doc/Basic_viewer/CGAL/Graphics_scene_options.h
index fe574bef90c..27bb711ab49 100644
--- a/Basic_viewer/doc/Basic_viewer/CGAL/Graphics_scene_options.h
+++ b/Basic_viewer/doc/Basic_viewer/CGAL/Graphics_scene_options.h
@@ -68,19 +68,19 @@ public:
   std::function<bool(const DS &, VolumeDescriptor)> volume_wireframe;
 
   /// `std::function` that returns the color of the given vertex.
-  /// nullptr by default.
+  /// `nullptr` by default.
   std::function<CGAL::IO::Color(const DS &, VertexDescriptor)> vertex_color;
 
   /// `std::function` that returns the color of the given edge.
-  /// nullptr by default.
+  /// `nullptr` by default.
   std::function<CGAL::IO::Color(const DS &, EdgeDescriptor)> edge_color;
 
   /// `std::function` that returns the color of the given face.
-  /// nullptr by default.
+  /// `nullptr` by default.
   std::function<CGAL::IO::Color(const DS &, FaceDescriptor)> face_color;
 
   /// `std::function` that returns the color of the given volume.
-  /// nullptr by default.
+  /// `nullptr` by default.
   /// Exists only if `VolumeDescriptor` is not `void`.
   std::function<CGAL::IO::Color(const DS &, VolumeDescriptor)> volume_color;
 
diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h
index 4669765f493..6681a4bb8b3 100644
--- a/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h
+++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h
@@ -806,7 +806,7 @@ namespace CGAL {
 
     /** Compute the dual of a Linear_cell_complex.
      * @param alcc the lcc in which we build the dual of this lcc.
-     * @param adart a dart of the initial lcc, nullptr by default.
+     * @param adart a dart of the initial lcc, `nullptr` by default.
      * @return adart of the dual lcc, the dual of adart if adart!=nullptr,
      *         any dart otherwise.
      * As soon as we don't modify this lcc and alcc lcc, we can iterate