diff --git a/plugin/visio/VisioGraphic.cpp b/plugin/visio/VisioGraphic.cpp
index d1df091..b22ec86 100644
--- a/plugin/visio/VisioGraphic.cpp
+++ b/plugin/visio/VisioGraphic.cpp
@@ -31,6 +31,8 @@
 #define isfinite(x) finite(x)
 #endif
 
+#include <cstdlib>
+
 #include "VisioGraphic.h"
 
 #include "gvcjob.h"
diff --git a/plugin/visio/VisioText.cpp b/plugin/visio/VisioText.cpp
index fad75fc..2b7db1a 100644
--- a/plugin/visio/VisioText.cpp
+++ b/plugin/visio/VisioText.cpp
@@ -19,6 +19,7 @@
 
 #include "gvcjob.h"
 #include "gvio.h"
+#include <cstdlib>
 #include <string.h>
 
 extern "C" char *xml_string(char* str);