diff --git a/l10n_ar_afipws_fe/models/account_move.py b/l10n_ar_afipws_fe/models/account_move.py
index 941bf8b1..d7aa5ae1 100644
--- a/l10n_ar_afipws_fe/models/account_move.py
+++ b/l10n_ar_afipws_fe/models/account_move.py
@@ -241,7 +241,7 @@ def do_pyafipws_request_cae(self):
             else:
                 fecha_serv_desde = fecha_serv_hasta = None
 
-            amounts = self._l10n_ar_get_amounts()
+            amounts = inv._l10n_ar_get_amounts()
             # invoice amount totals:
             imp_total = str("%.2f" % inv.amount_total)
             # ImpTotConc es el iva no gravado