--- graphviz-2.36.0/plugin/visio/VisioText.cpp.orig	2014-01-11 23:59:44.000000000 +0100
+++ graphviz-2.36.0/plugin/visio/VisioText.cpp	2014-04-06 22:19:55.288689473 +0200
@@ -19,6 +19,7 @@
 
 #include "gvcjob.h"
 #include "gvio.h"
+#include <stdlib.h>
 #include <string.h>
 
 extern "C" char *xml_string(char* str);