diff --git a/plugin/visio/VisioGraphic.cpp b/plugin/visio/VisioGraphic.cpp
index 303eac0..14e377c 100644
--- a/plugin/visio/VisioGraphic.cpp
+++ b/plugin/visio/VisioGraphic.cpp
@@ -29,6 +29,8 @@
 #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 635806c..3c6441a 100644
--- a/plugin/visio/VisioText.cpp
+++ b/plugin/visio/VisioText.cpp
@@ -17,6 +17,7 @@
 
 #include "gvcjob.h"
 #include "gvio.h"
+#include <cstdlib>
 #include <string.h>
 
 extern "C" char *xml_string(char* str);