diff --git a/Snap_rounding_2/include/CGAL/Snap_rounding_kd_2.h b/Snap_rounding_2/include/CGAL/Snap_rounding_kd_2.h
index 7dbdf1cd8c5..d695f373445 100755
--- a/Snap_rounding_2/include/CGAL/Snap_rounding_kd_2.h
+++ b/Snap_rounding_2/include/CGAL/Snap_rounding_kd_2.h
@@ -158,6 +158,11 @@ public:
   }  
 };
 
+/////////////////////
+/////////////////////
+//Multiple_kd_tree
+/////////////////////
+
 template<class Traits_, class SAVED_OBJECT>
 class Multiple_kd_tree {
   CGAL_static_assertion_msg((boost::is_pointer<SAVED_OBJECT>::value), "SAVED_OBJECT is not a pointer.");