From 0ff30ead3152ee05d3848346b76853831db37b6d Mon Sep 17 00:00:00 2001
From: Robert Nishihara <robertnishihara@gmail.com>
Date: Thu, 16 Jun 2016 10:04:04 -0700
Subject: [PATCH] adding an include

---
 include/ray/ray.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/ray/ray.h b/include/ray/ray.h
index eda0e3f9e..72d82ee66 100644
--- a/include/ray/ray.h
+++ b/include/ray/ray.h
@@ -3,6 +3,7 @@
 
 #include <vector>
 #include <unordered_map>
+#include <algorithm>
 #include "logging.h"
 
 typedef size_t ObjRef;