From 2531010a0a5b9380aea4d42bbbb2831171471658 Mon Sep 17 00:00:00 2001
From: Edward Diener <eldiener@tropicsoft.com>
Date: Thu, 2 Apr 2015 08:00:13 -0400
Subject: [PATCH] Added include for integral constant.

---
 include/boost/mpl/empty_base.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/boost/mpl/empty_base.hpp b/include/boost/mpl/empty_base.hpp
index 69630a5..cb56ef6 100644
--- a/include/boost/mpl/empty_base.hpp
+++ b/include/boost/mpl/empty_base.hpp
@@ -19,6 +19,7 @@
 #include <boost/mpl/aux_/config/workaround.hpp>
 #include <boost/mpl/aux_/lambda_support.hpp>
 
+#include <boost/type_traits/integral_constant.hpp>
 #include <boost/type_traits/is_empty.hpp>
 
 namespace boost { namespace mpl {