diff --git a/include/boost/container_hash/hash.hpp b/include/boost/container_hash/hash.hpp
index 5fa8e2e..a2b2759 100644
--- a/include/boost/container_hash/hash.hpp
+++ b/include/boost/container_hash/hash.hpp
@@ -331,15 +331,8 @@ namespace boost
     // Implementation by Alberto Barbati and Dave Harris.
     template <class T> std::size_t hash_value(T* const& v)
     {
-#if defined(__VMS) && __INITIAL_POINTER_SIZE == 64
-    // for some reason ptrdiff_t on OpenVMS compiler with
-    // 64 bit is not 64 bit !!!
         std::size_t x = static_cast<std::size_t>(
-           reinterpret_cast<long long int>(v));
-#else
-        std::size_t x = static_cast<std::size_t>(
-           reinterpret_cast<std::ptrdiff_t>(v));
-#endif
+           reinterpret_cast<boost::uintptr_t>(v));
         return x + (x >> 3);
     }