diff --git a/SMDS_3/include/CGAL/Simplicial_mesh_cell_base_3.h b/SMDS_3/include/CGAL/Simplicial_mesh_cell_base_3.h
index 568dc53b4df..15a4b1fd3eb 100644
--- a/SMDS_3/include/CGAL/Simplicial_mesh_cell_base_3.h
+++ b/SMDS_3/include/CGAL/Simplicial_mesh_cell_base_3.h
@@ -56,6 +56,7 @@ public:
 public:
   // Constructors
   Simplicial_mesh_cell_3()
+    : time_stamp_(std::size_t(-1))
   {}
 
   Simplicial_mesh_cell_3(const Simplicial_mesh_cell_3& rhs)
diff --git a/SMDS_3/include/CGAL/Simplicial_mesh_vertex_base_3.h b/SMDS_3/include/CGAL/Simplicial_mesh_vertex_base_3.h
index b544c5e7721..3f1a9c92d42 100644
--- a/SMDS_3/include/CGAL/Simplicial_mesh_vertex_base_3.h
+++ b/SMDS_3/include/CGAL/Simplicial_mesh_vertex_base_3.h
@@ -64,6 +64,7 @@ public:
     , index_()
     , dimension_(-1)
     , cache_validity(false)
+    , time_stamp_(std::size_t(-1))
   {}
 
   // Default copy constructor and assignment operator are ok