diff --git a/include/boost/throw_exception.hpp b/include/boost/throw_exception.hpp
index 36e2733..3f06fcd 100644
--- a/include/boost/throw_exception.hpp
+++ b/include/boost/throw_exception.hpp
@@ -15,6 +15,8 @@
 //  This software is provided "as is" without express or implied
 //  warranty, and with no claim as to its suitability for any purpose.
 //
+//  http://www.boost.org/libs/utility/throw_exception.html
+//
 
 #include <boost/config.hpp>