diff --git a/include/boost/utility/swap.hpp b/include/boost/utility/swap.hpp
index da293ee..71cc454 100644
--- a/include/boost/utility/swap.hpp
+++ b/include/boost/utility/swap.hpp
@@ -20,7 +20,7 @@ namespace boost_swap_impl
   template<class T>
   void swap_impl(T& left, T& right)
   {
-    using std::swap;//use std::swap if argument dependent lookup fails
+    using namespace std;//use std::swap if argument dependent lookup fails
     swap(left,right);
   }