diff --git a/retroshare-gui/src/gui/elastic/graphwidget.h b/retroshare-gui/src/gui/elastic/graphwidget.h
index 24acf698b..7927741b3 100644
--- a/retroshare-gui/src/gui/elastic/graphwidget.h
+++ b/retroshare-gui/src/gui/elastic/graphwidget.h
@@ -43,6 +43,7 @@
 #define GRAPHWIDGET_H
 
 #include <QtGui/QGraphicsView>
+#include <stdint.h>
 
 class Node;