diff --git a/retroshare-gui/src/gui/common/HashBox.h b/retroshare-gui/src/gui/common/HashBox.h
index 0e9bb17f8..dae09b348 100644
--- a/retroshare-gui/src/gui/common/HashBox.h
+++ b/retroshare-gui/src/gui/common/HashBox.h
@@ -23,6 +23,7 @@
 #define HASHBOX_H
 
 #include <QScrollArea>
+#include <stdint.h>
 
 namespace Ui {
 	class HashBox;