diff --git a/include/boost/polygon/polygon_45_set_data.hpp b/include/boost/polygon/polygon_45_set_data.hpp
index 1ab4c25..cf03518 100644
--- a/include/boost/polygon/polygon_45_set_data.hpp
+++ b/include/boost/polygon/polygon_45_set_data.hpp
@@ -1456,7 +1456,7 @@ namespace boost { namespace polygon{
 
   template <typename cT, typename iT>
   void get_error_rects_shell(cT& posE, cT& negE, iT beginr, iT endr) {
-    typedef typename iT::value_type Point;
+    typedef typename std::iterator_traits<iT>::value_type Point;
     typedef typename point_traits<Point>::coordinate_type Unit;
     typedef typename coordinate_traits<Unit>::area_type area_type;
     Point pt1, pt2, pt3;
diff --git a/test/voronoi_ctypes_test.cpp b/test/voronoi_ctypes_test.cpp
index 0485854..fc87290 100644
--- a/test/voronoi_ctypes_test.cpp
+++ b/test/voronoi_ctypes_test.cpp
@@ -24,8 +24,8 @@ BOOST_AUTO_TEST_CASE(ulp_comparison_test1) {
   uint64 a = 22;
   uint64 b = 27;
   fpt64 da, db;
-  memcpy(&da, &a, sizeof(uint64));
-  memcpy(&db, &b, sizeof(uint64));
+  std::memcpy(&da, &a, sizeof(uint64));
+  std::memcpy(&db, &b, sizeof(uint64));
   BOOST_CHECK_EQUAL(ulp_cmp(da, db, 1), ulp_cmp.LESS);
   BOOST_CHECK_EQUAL(ulp_cmp(db, da, 1), ulp_cmp.MORE);
   BOOST_CHECK_EQUAL(ulp_cmp(da, db, 4), ulp_cmp.LESS);
@@ -38,8 +38,8 @@ BOOST_AUTO_TEST_CASE(ulp_comparison_test2) {
   uint64 a = 0ULL;
   uint64 b = 0x8000000000000002ULL;
   fpt64 da, db;
-  memcpy(&da, &a, sizeof(uint64));
-  memcpy(&db, &b, sizeof(uint64));
+  std::memcpy(&da, &a, sizeof(uint64));
+  std::memcpy(&db, &b, sizeof(uint64));
   BOOST_CHECK_EQUAL(ulp_cmp(da, db, 1), ulp_cmp.MORE);
   BOOST_CHECK_EQUAL(ulp_cmp(db, da, 1), ulp_cmp.LESS);
   BOOST_CHECK_EQUAL(ulp_cmp(da, db, 2), ulp_cmp.EQUAL);