From 3b73824842c91fbfdda84180d4aa0d6101c4dd2c Mon Sep 17 00:00:00 2001
From: Frank <frankrouter@gmail.com>
Date: Thu, 30 Jun 2016 05:28:28 +0800
Subject: [PATCH] Fix ambiguous call to abs(c or c++). (#1308)

---
 src/tree/param.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/tree/param.h b/src/tree/param.h
index e9de3ac14..23d0c5b81 100644
--- a/src/tree/param.h
+++ b/src/tree/param.h
@@ -9,6 +9,7 @@
 
 #include <vector>
 #include <cstring>
+#include <cmath>
 
 namespace xgboost {
 namespace tree {