diff --git a/titan-compiler/coder.lua b/titan-compiler/coder.lua
index 689aca8..c6d9f3f 100644
--- a/titan-compiler/coder.lua
+++ b/titan-compiler/coder.lua
@@ -784,6 +784,8 @@ local preamble = [[
 
 #include "lobject.h"
 
+#include <math.h>
+
 ]]
 
 local postamble = [[