--- librecad/src/lib/engine/rs_spline.cpp.old	2016-06-20 20:43:27.000000000 +0200
+++ librecad/src/lib/engine/rs_spline.cpp	2016-09-05 13:23:25.459841304 +0200
@@ -26,6 +26,7 @@
 
 #include<iostream>
 #include<cmath>
+#include<numeric>
 #include "rs_spline.h"