diff --git a/Filtered_kernel/include/CGAL/Lazy_kernel.h b/Filtered_kernel/include/CGAL/Lazy_kernel.h
index 513d00675cc..e8da43f432f 100644
--- a/Filtered_kernel/include/CGAL/Lazy_kernel.h
+++ b/Filtered_kernel/include/CGAL/Lazy_kernel.h
@@ -42,12 +42,11 @@ namespace CGAL {
 // Exact_kernel = exact kernel that will be made lazy
 // Kernel = lazy kernel
 
-// the Generic base simply applies the generic magic functor stupidly.
-// then the real base fixes up a few special cases.
+// `Lazy_kernel_generic_base` applies the generic magic functor stupidly.
+// `Lazy_kernel_base` fixes up a few special cases.
 template < typename EK_, typename AK_, typename E2A_, typename Kernel_ >
 class Lazy_kernel_generic_base
   // : public Filtered_kernel_base<EK_>
-    // TODO : Static_filters_base too ?  Check performance
 {
 public:
 
@@ -177,11 +176,6 @@ public:
             typename Approximate_kernel::Intersect_point_3_for_polyhedral_envelope,
             typename Exact_kernel::Intersect_point_3_for_polyhedral_envelope> Intersect_point_3_for_polyhedral_envelope;
 
-  // typedef void Compute_z_3; // to detect where .z() is called
-  // typedef void Construct_point_3; // to detect where the ctor is called
-
-
-
   struct Compute_weight_2 : public BaseClass::Compute_weight_2
   {
     typedef typename Kernel_::FT FT;
@@ -413,7 +407,6 @@ public:
 
   };
 
-
   struct Less_xyz_3 : public BaseClass::Less_xyz_3
   {
     typedef typename Kernel_::Point_3 Point_3;