diff --git a/retroshare-gui/src/gui/statistics/BWGraph.cpp b/retroshare-gui/src/gui/statistics/BWGraph.cpp
index 97cab8328..d55f35ef4 100644
--- a/retroshare-gui/src/gui/statistics/BWGraph.cpp
+++ b/retroshare-gui/src/gui/statistics/BWGraph.cpp
@@ -1,5 +1,6 @@
 #include "BWGraph.h"
 
+#include <time.h>
 
 void BWGraphSource::update()
 {