diff --git a/Filtered_kernel/include/CGAL/Lazy.h b/Filtered_kernel/include/CGAL/Lazy.h
index 7ced60f16af..7baa38844af 100644
--- a/Filtered_kernel/include/CGAL/Lazy.h
+++ b/Filtered_kernel/include/CGAL/Lazy.h
@@ -29,6 +29,8 @@
 #include <CGAL/Kernel/Return_base_tag.h>
 #include <CGAL/min_max_n.h>
 #include <CGAL/Origin.h>
+#include <CGAL/Bbox_2.h>
+#include <CGAL/Bbox_3.h>
 #include <vector>
 #include <CGAL/Default.h>