diff --git a/include/boost/core/swap.hpp b/include/boost/core/swap.hpp
index 73a454c..49e1b2d 100644
--- a/include/boost/core/swap.hpp
+++ b/include/boost/core/swap.hpp
@@ -23,12 +23,12 @@
 
 #include <boost/core/enable_if.hpp>
 #include <boost/config.hpp>
-#if __cplusplus >= 201103L || defined(BOOST_MSVC)
-#include <utility> //for std::swap (C++11)
+#if __cplusplus >= 201103L || defined(BOOST_DINKUMWARE_STDLIB)
+#include <utility> // for std::swap (C++11)
 #else
-#include <algorithm> //for std::swap (C++98)
+#include <algorithm> // for std::swap (C++98)
 #endif
-#include <cstddef> //for std::size_t
+#include <cstddef> // for std::size_t
 
 namespace boost_swap_impl
 {