diff --git a/retroshare-gui/src/util/misc.cpp b/retroshare-gui/src/util/misc.cpp
index adb422a4c..45b9ef41a 100644
--- a/retroshare-gui/src/util/misc.cpp
+++ b/retroshare-gui/src/util/misc.cpp
@@ -38,7 +38,7 @@ QString misc::friendlyUnit(float val)
     if(val < 0) {
         return tr("Unknown", "Unknown (size)");
     }
-    const QString units[5] = {tr(" B", "bytes"), tr(" KB", "kilobytes (1024 bytes)"), tr(" MB", "megabytes (1024 kilobytes)"), tr(" GB", "gigabytes (1024 megabytes)"), tr(" TB", "terabytes (1024 gigabytes)") };
+    const QString units[6] = {tr(" B", "bytes"), tr(" KB", "kilobytes (1024 bytes)"), tr(" MB", "megabytes (1024 kilobytes)"), tr(" GB", "gigabytes (1024 megabytes)"), tr(" TB", "terabytes (1024 gigabytes)"), tr(" PB", "petabytes (1024 terabytes)") };
     for(unsigned int i=0; i<5; ++i) {
         if (val < 1024.) {
             return QString(QByteArray::number(val, 'f', 1)) + units[i];