diff --git a/include/boost/detail/container_fwd.hpp b/include/boost/detail/container_fwd.hpp
index 8685905..b7e3a71 100644
--- a/include/boost/detail/container_fwd.hpp
+++ b/include/boost/detail/container_fwd.hpp
@@ -6,6 +6,10 @@
 #if !defined(BOOST_DETAIL_CONTAINER_FWD_HPP)
 #define BOOST_DETAIL_CONTAINER_FWD_HPP
 
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
 #include <boost/config.hpp>
 #include <boost/detail/workaround.hpp>