From 9d3db8de1f14e50bde0d7e9502dadc149db85a05 Mon Sep 17 00:00:00 2001
From: Leonardo de Moura <leonardo@microsoft.com>
Date: Fri, 14 Feb 2014 19:56:23 -0800
Subject: [PATCH] fix(kernel/diff_cnstrs): missing include

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
---
 src/kernel/diff_cnstrs.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/kernel/diff_cnstrs.cpp b/src/kernel/diff_cnstrs.cpp
index ebab6ef697..6e7c96dc54 100644
--- a/src/kernel/diff_cnstrs.cpp
+++ b/src/kernel/diff_cnstrs.cpp
@@ -8,6 +8,7 @@ Author: Leonardo de Moura
 #include <utility>
 #include <unordered_map>
 #include <vector>
+#include <functional>
 #include "util/hash.h"
 #include "util/safe_arith.h"
 #include "kernel/diff_cnstrs.h"