diff --git a/include/boost/thread/barrier.hpp b/include/boost/thread/barrier.hpp
index ea76d40f..bb1be49b 100644
--- a/include/boost/thread/barrier.hpp
+++ b/include/boost/thread/barrier.hpp
@@ -24,7 +24,16 @@ public:
 
 private:
     mutex m_mutex;
+// disable warnings about non dll import
+// see: http://www.boost.org/more/separate_compilation.html#dlls
+#ifdef BOOST_MSVC
+#   pragma warning(push)
+#   pragma warning(disable: 4251 4231 4660 4275)
+#endif    
     condition m_cond;
+#ifdef BOOST_MSVC
+#   pragma warning(pop)
+#endif
     unsigned int m_threshold;
     unsigned int m_count;
     unsigned int m_generation;
diff --git a/include/boost/thread/condition.hpp b/include/boost/thread/condition.hpp
index 39becb63..9fddf8de 100644
--- a/include/boost/thread/condition.hpp
+++ b/include/boost/thread/condition.hpp
@@ -22,7 +22,12 @@
 namespace boost {
 
 struct xtime;
-
+// disable warnings about non dll import
+// see: http://www.boost.org/more/separate_compilation.html#dlls
+#ifdef BOOST_MSVC
+#   pragma warning(push)
+#   pragma warning(disable: 4251 4231 4660 4275)
+#endif
 namespace detail {
 
 class BOOST_THREAD_DECL condition_impl : private noncopyable
@@ -180,7 +185,9 @@ private:
         return ret;
     }
 };
-
+#ifdef BOOST_MSVC
+#   pragma warning(pop)
+#endif
 } // namespace boost
 
 // Change Log:
diff --git a/include/boost/thread/mutex.hpp b/include/boost/thread/mutex.hpp
index 487e6d45..6ad04f0f 100644
--- a/include/boost/thread/mutex.hpp
+++ b/include/boost/thread/mutex.hpp
@@ -23,7 +23,12 @@
 namespace boost {
 
 struct xtime;
-
+// disable warnings about non dll import
+// see: http://www.boost.org/more/separate_compilation.html#dlls
+#ifdef BOOST_MSVC
+#   pragma warning(push)
+#   pragma warning(disable: 4251 4231 4660 4275)
+#endif
 class BOOST_THREAD_DECL mutex
     : private noncopyable
 {
@@ -150,7 +155,9 @@ private:
     threads::mac::detail::scoped_critical_region m_mutex_mutex;
 #endif
 };
-
+#ifdef BOOST_MSVC
+#   pragma warning(pop)
+#endif
 } // namespace boost
 
 // Change Log:
diff --git a/include/boost/thread/read_write_mutex.hpp b/include/boost/thread/read_write_mutex.hpp
index cb0139ce..0f3e325b 100644
--- a/include/boost/thread/read_write_mutex.hpp
+++ b/include/boost/thread/read_write_mutex.hpp
@@ -22,7 +22,12 @@
 #include <boost/thread/condition.hpp>
 
 namespace boost {
-
+// disable warnings about non dll import
+// see: http://www.boost.org/more/separate_compilation.html#dlls
+#ifdef BOOST_MSVC
+#   pragma warning(push)
+#   pragma warning(disable: 4251 4231 4660 4275)
+#endif
 namespace read_write_scheduling_policy {
     enum read_write_scheduling_policy_enum
     {
@@ -260,7 +265,9 @@ private:
 
     detail::thread::read_write_mutex_impl<timed_mutex> m_impl; 
 };
-
+#ifdef BOOST_MSVC
+#   pragma warning(pop)
+#endif
 }    // namespace boost
 
 #endif
diff --git a/include/boost/thread/recursive_mutex.hpp b/include/boost/thread/recursive_mutex.hpp
index 09aa9431..a7efa48f 100644
--- a/include/boost/thread/recursive_mutex.hpp
+++ b/include/boost/thread/recursive_mutex.hpp
@@ -23,7 +23,12 @@
 namespace boost {
 
 struct xtime;
-
+// disable warnings about non dll import
+// see: http://www.boost.org/more/separate_compilation.html#dlls
+#ifdef BOOST_MSVC
+#   pragma warning(push)
+#   pragma warning(disable: 4251 4231 4660 4275)
+#endif
 class BOOST_THREAD_DECL recursive_mutex
     : private noncopyable
 {
@@ -164,7 +169,9 @@ private:
     std::size_t m_count;
 #endif
 };
-
+#ifdef BOOST_MSVC
+#   pragma warning(pop)
+#endif
 } // namespace boost
 
 #endif // BOOST_RECURSIVE_MUTEX_WEK070601_HPP
diff --git a/include/boost/thread/thread.hpp b/include/boost/thread/thread.hpp
index a3575ee2..64ab35c7 100644
--- a/include/boost/thread/thread.hpp
+++ b/include/boost/thread/thread.hpp
@@ -25,7 +25,12 @@
 namespace boost {
 
 struct xtime;
-
+// disable warnings about non dll import
+// see: http://www.boost.org/more/separate_compilation.html#dlls
+#ifdef BOOST_MSVC
+#   pragma warning(push)
+#   pragma warning(disable: 4251 4231 4660 4275)
+#endif
 class BOOST_THREAD_DECL thread : private noncopyable
 {
 public:
@@ -71,7 +76,9 @@ private:
     std::list<thread*> m_threads;
     mutex m_mutex;
 };
-
+#ifdef BOOST_MSVC
+#   pragma warning(pop)
+#endif
 } // namespace boost
 
 // Change Log: