diff --git a/include/boost/python/slice.hpp b/include/boost/python/slice.hpp
index eee60d71..9354b485 100644
--- a/include/boost/python/slice.hpp
+++ b/include/boost/python/slice.hpp
@@ -6,6 +6,7 @@
 //  Boost Software License, Version 1.0. (See accompanying file 
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
+#include <boost/python/detail/prefix.hpp>
 #include <boost/config.hpp>
 #include <boost/python/object.hpp>
 #include <boost/python/extract.hpp>