diff --git a/retroshare-gui/src/gui/ChatLobbyWidget.cpp b/retroshare-gui/src/gui/ChatLobbyWidget.cpp
index 4d1104e5a..6809ba546 100644
--- a/retroshare-gui/src/gui/ChatLobbyWidget.cpp
+++ b/retroshare-gui/src/gui/ChatLobbyWidget.cpp
@@ -543,6 +543,9 @@ void ChatLobbyWidget::updateMessageChanged(ChatLobbyId id)
 
 	QTreeWidgetItem *item = getTreeWidgetItem(id) ;
 
+	if(item == NULL)
+		return ;
+
 	item->setIcon(0,_lobby_infos[id].default_icon) ;
 }