From a13e702d0e8aa78b9ed5524911bd4c07bffee3b1 Mon Sep 17 00:00:00 2001
From: Stuart Campbell <stuart@stuartcampbell.me>
Date: Mon, 28 Dec 2015 11:47:21 -0500
Subject: [PATCH] Added include back in for RHEL6

added <set> back in
refs #12627
---
 Framework/Crystal/src/ClusterRegister.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Framework/Crystal/src/ClusterRegister.cpp b/Framework/Crystal/src/ClusterRegister.cpp
index 8a986ee21dd..a259ba62090 100644
--- a/Framework/Crystal/src/ClusterRegister.cpp
+++ b/Framework/Crystal/src/ClusterRegister.cpp
@@ -3,6 +3,7 @@
 #include "MantidCrystal/CompositeCluster.h"
 #include <boost/make_shared.hpp>
 #include <boost/functional/hash.hpp>
+#include <set>
 
 namespace {
 template <typename T> std::pair<T, T> ordered_pair(const T &a, const T &b) {
-- 
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