diff --git a/src/main.cpp b/src/main.cpp
index bb8127b45..7ff8dc41e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -26,6 +26,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 #include <iostream>
+#include <stdlib.h>
 #include "Context.h"
 
 Context context;