diff --git a/Nef_S2/include/CGAL/Nef_S2/Sphere_map.h b/Nef_S2/include/CGAL/Nef_S2/Sphere_map.h
index b2821710e58..0f0263f0677 100644
--- a/Nef_S2/include/CGAL/Nef_S2/Sphere_map.h
+++ b/Nef_S2/include/CGAL/Nef_S2/Sphere_map.h
@@ -376,7 +376,7 @@ public:
   SVertex* get_vertex_node( const SVertex& ) {
     SVertex* p = vertex_allocator.allocate(1);
 #ifdef CGAL_CXX11
-    std::allocator_traits<SVertex_alloc>::construct(vertex_allocator, p, SVertex());
+    std::allocator_traits<SVertex_alloc>::construct(vertex_allocator, p);
 #else
     vertex_allocator.construct( p, SVertex());
 #endif
@@ -384,7 +384,7 @@ public:
   }
   void put_vertex_node( SVertex* p) {
 #ifdef CGAL_CXX11
-    std::allocator_traits<Vertex_alloc>::destroy(vertex_allocator, p);
+    std::allocator_traits<SVertex_alloc>::destroy(vertex_allocator, p);
 #else
     vertex_allocator.destroy(p);
 #endif
@@ -395,7 +395,7 @@ public:
   SHalfedge* get_halfedge_node( const SHalfedge& ) {
     SHalfedge* p = halfedge_allocator.allocate(1);
 #ifdef CGAL_CXX11
-    std::allocator_traits<Shalfedge_alloc>::construct(halfedge_allocator, p, SHalfedge());
+    std::allocator_traits<SHalfedge_alloc>::construct(halfedge_allocator, p);
 #else
     halfedge_allocator.construct( p, SHalfedge());
 #endif
@@ -414,7 +414,7 @@ public:
   SFace* get_face_node( const SFace& ) {
     SFace* p = face_allocator.allocate(1);
 #ifdef CGAL_CXX11
-    std::allocator_traits<SFace_alloc>::construct(face_allocator, p, Vertex());
+    std::allocator_traits<SFace_alloc>::construct(face_allocator, p);
 #else
     face_allocator.construct( p, SFace());
 #endif
diff --git a/STL_Extension/include/CGAL/Concurrent_compact_container.h b/STL_Extension/include/CGAL/Concurrent_compact_container.h
index 22bd96ceca6..9ec83487b16 100644
--- a/STL_Extension/include/CGAL/Concurrent_compact_container.h
+++ b/STL_Extension/include/CGAL/Concurrent_compact_container.h
@@ -404,8 +404,8 @@ public:
   {
     FreeList * fl = get_free_list();
     pointer ret = init_insert(fl);
- #ifdef CGAL_CXX11
-    std::allocator_traits<allocator_type>::construct(am_lloc, ret, t);
+#ifdef CGAL_CXX11
+    std::allocator_traits<allocator_type>::construct(m_alloc, ret, t);
 #else
     m_alloc.construct(ret, t);
 #endif
diff --git a/Surface_sweep_2/include/CGAL/No_intersection_surface_sweep_2.h b/Surface_sweep_2/include/CGAL/No_intersection_surface_sweep_2.h
index 1b903c92ebf..efac2e8109c 100644
--- a/Surface_sweep_2/include/CGAL/No_intersection_surface_sweep_2.h
+++ b/Surface_sweep_2/include/CGAL/No_intersection_surface_sweep_2.h
@@ -170,17 +170,15 @@ public:
 #ifdef CGAL_CXX11
   typedef std::allocator_traits<Allocator> Allocator_traits;
   typedef typename Allocator_traits::template rebind_alloc<Event> Event_alloc;
-  
-  typedef std::allocator_traits<Allocator> Allocator_traits;
   typedef typename Allocator_traits::template rebind_alloc<Subcurve> Subcurve_alloc;
-#else  
+#else // not CGAL_CXX11
   typedef typename Allocator::template rebind<Event>    Event_alloc_rebind;
   typedef typename Event_alloc_rebind::other            Event_alloc;
 
   typedef typename Allocator::template rebind<Subcurve> Subcurve_alloc_rebind;
   typedef typename Subcurve_alloc_rebind::other         Subcurve_alloc;
-#endif
-
+#endif // not CGAL_CXX11
+  
 protected:
   /*! \struct
    * An auxiliary functor for comparing event pointers.