diff --git a/wrap/system/qgetopt.cpp b/wrap/system/qgetopt.cpp
index 68f7dcc4..427b17e9 100644
--- a/wrap/system/qgetopt.cpp
+++ b/wrap/system/qgetopt.cpp
@@ -2,6 +2,7 @@
 #include <QtCore/QVariant>
 #include "qgetopt.h"
 
+#include <stdlib.h>
 #include <iostream>
 using namespace std;