diff --git a/addons/account/account_move_line.py b/addons/account/account_move_line.py
index 46d18515df4..dea6a4afb95 100644
--- a/addons/account/account_move_line.py
+++ b/addons/account/account_move_line.py
@@ -624,6 +624,8 @@ class account_move_line(osv.osv):
                     attrs.append('sum="Total debit"')
                 elif field.field=='credit':
                     attrs.append('sum="Total credit"')
+                elif field.field=='account_tax_id':
+                    attrs.append('domain="[(\'parent_id\',\'=\',False)]"')
                 elif field.field=='account_id' and journal.id:
                     attrs.append('domain="[(\'journal_id\', \'=\', '+str(journal.id)+'),(\'type\',\'<>\',\'view\'), (\'type\',\'<>\',\'closed\')]"')
                 if field.readonly: