diff --git a/include/boost/throw_exception.hpp b/include/boost/throw_exception.hpp
index 97a2695..e30e238 100644
--- a/include/boost/throw_exception.hpp
+++ b/include/boost/throw_exception.hpp
@@ -1,6 +1,8 @@
 #ifndef BOOST_THROW_EXCEPTION_HPP_INCLUDED
 #define BOOST_THROW_EXCEPTION_HPP_INCLUDED
 
+// MS compatible compilers support #pragma once
+
 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
 # pragma once
 #endif