diff --git a/tryton/gui/window/view_form/model/group.py b/tryton/gui/window/view_form/model/group.py
index a15bc9d4f0..dae254d2c2 100644
--- a/tryton/gui/window/view_form/model/group.py
+++ b/tryton/gui/window/view_form/model/group.py
@@ -157,6 +157,7 @@ class Group(SignalEvent, list):
         parent = self.parent
         while parent:
             root = parent.group
+            parent = parent.parent
         return root
 
     def written(self, ids):