From 9b5e5698bd017d2e0cc94e0e4b52c7b8c21cb143 Mon Sep 17 00:00:00 2001
From: Cristian Lalescu <Cristian.Lalescu@ds.mpg.de>
Date: Mon, 14 Aug 2017 21:29:08 +0200
Subject: [PATCH] add required header

---
 bfps/cpp/particles/particles_system_builder.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/bfps/cpp/particles/particles_system_builder.hpp b/bfps/cpp/particles/particles_system_builder.hpp
index 7a2d49c0..a3bc689d 100644
--- a/bfps/cpp/particles/particles_system_builder.hpp
+++ b/bfps/cpp/particles/particles_system_builder.hpp
@@ -3,6 +3,7 @@
 
 #include <string>
 
+#include <cmath>
 #include "abstract_particles_system.hpp"
 #include "particles_system.hpp"
 #include "particles_input_hdf5.hpp"
-- 
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