diff --git a/code/MathUtility.cpp b/code/MathUtility.cpp
index ae67301..afd2c60 100644
--- a/code/MathUtility.cpp
+++ b/code/MathUtility.cpp
@@ -1,4 +1,5 @@
 #include "MathUtility.hpp"
+#include <cmath>

 const float MathUtility::Pi = 3.1415f;
 const float MathUtility::twoPi = 2 * MathUtility::Pi;
diff --git a/other/build.sh b/other/build.sh
old mode 100644
new mode 100755