--- ./SConstruct	2015-12-02 21:01:34.000000000 +0200
+++ ./SConstruct	2015-12-22 11:18:23.613216445 +0200
@@ -2245,6 +2245,7 @@ def doConfigure(myenv):
             # permit more than four parameters.
             "BOOST_THREAD_DONT_PROVIDE_VARIADIC_THREAD",
             "BOOST_SYSTEM_NO_DEPRECATED",
+            "BOOST_OPTIONAL_USE_SINGLETON_DEFINITION_OF_NONE",
         ]
     )