From 85b60a1e8171aa3d357724139322dd7d8f8fa6b3 Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Tue, 2 Jun 2015 18:25:32 +0100
Subject: [PATCH] Add missing #include.

---
 include/boost/multiprecision/traits/is_backend.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/boost/multiprecision/traits/is_backend.hpp b/include/boost/multiprecision/traits/is_backend.hpp
index bb332b3e..9b23c866 100644
--- a/include/boost/multiprecision/traits/is_backend.hpp
+++ b/include/boost/multiprecision/traits/is_backend.hpp
@@ -7,6 +7,7 @@
 #define BOOST_MP_IS_BACKEND_HPP
 
 #include <boost/mpl/has_xxx.hpp>
+#include <boost/type_traits/conditional.hpp>
 #include <boost/type_traits/is_convertible.hpp>
 #include <boost/multiprecision/detail/number_base.hpp>