--- src/gui/ophcrackgui.cpp.orig	Tue Jun  4 09:42:47 2013
+++ src/gui/ophcrackgui.cpp	Fri Jun  7 11:01:28 2013
@@ -29,6 +29,7 @@
  *   
  *   
 */
+#include <cstdlib>
 #include <QHeaderView>
 #include <QMessageBox>
 #include <QTimer>
