diff --git a/weboob/applications/qboobmsg/messages_manager.py b/weboob/applications/qboobmsg/messages_manager.py
index 10688336..87351ac0 100644
--- a/weboob/applications/qboobmsg/messages_manager.py
+++ b/weboob/applications/qboobmsg/messages_manager.py
@@ -138,8 +138,9 @@ class MessagesManager(QWidget):
 
         top.addChild(item)
 
-        for child in message.children:
-            self._insert_message(child, item)
+        if message.children is not None:
+            for child in message.children:
+                self._insert_message(child, item)
 
     def _messageSelected(self, item, column):
         message = item.data(0, Qt.UserRole).toPyObject()