diff --git a/retroshare-gui/src/gui/gxs/GxsIdTreeWidgetItem.cpp b/retroshare-gui/src/gui/gxs/GxsIdTreeWidgetItem.cpp
index e56a1011b..053590e11 100644
--- a/retroshare-gui/src/gui/gxs/GxsIdTreeWidgetItem.cpp
+++ b/retroshare-gui/src/gui/gxs/GxsIdTreeWidgetItem.cpp
@@ -196,6 +196,10 @@ void GxsIdTreeItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem
     QString dt = index.data(Qt::UserRole).toString();
     RsGxsId id(index.data(Qt::UserRole).toString().toStdString());
 
+    // This is a trick: UserRole in Mail generally is 0000...00000 when there is a notification, and is empty when there are multiple
+    // destinations at once. This is not so nice to do that this way, but it's a quick workaround to a more complex method involving an
+    // additional Qt role only to determine the number of destinations.
+
     if(dt == "")
         ownOption.icon = FilesDefs::getIconFromQtResourcePath(":/icons/svg/people2.svg");
     else if(id.isNull())