From 2f13b9ee4a08ab3579a2ca8e92270da5aa299763 Mon Sep 17 00:00:00 2001
From: Ichthyostega <prg@ichthyostega.de>
Date: Fri, 20 Nov 2015 02:36:34 +0100
Subject: [PATCH] fix compilation problem with gcc-5

..while we should note at this point that the whole techique
of hijacking std::hash is superfluous now, since the standard libray
does no longer define a static assertion which defeats SFINAE
---
 src/lib/hash-standard.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/lib/hash-standard.hpp b/src/lib/hash-standard.hpp
index af022da7d..bb307aed1 100644
--- a/src/lib/hash-standard.hpp
+++ b/src/lib/hash-standard.hpp
@@ -72,6 +72,7 @@
 
 
 #include <cstddef>
+#include <utility>
 #include <boost/utility/enable_if.hpp>