diff --git a/addons/account/report/account_invoice_report.py b/addons/account/report/account_invoice_report.py
index aa37b7bec3cf3..7861644525ac4 100644
--- a/addons/account/report/account_invoice_report.py
+++ b/addons/account/report/account_invoice_report.py
@@ -114,7 +114,8 @@ def _sub_select(self):
                     ai.partner_bank_id,
                     SUM ((invoice_type.sign_qty * ail.quantity) / u.factor * u2.factor) AS product_qty,
                     SUM(ail.price_subtotal_signed * invoice_type.sign) AS price_total,
-                    SUM(ai.amount_total * invoice_type.sign) AS amount_total,
+                    (ai.amount_total * invoice_type.sign) / (SELECT count(*) FROM account_invoice_line l where invoice_id = ai.id) *
+                    count(*) * invoice_type.sign AS amount_total,
                     SUM(ABS(ail.price_subtotal_signed)) / CASE
                             WHEN SUM(ail.quantity / u.factor * u2.factor) <> 0::numeric
                                THEN SUM(ail.quantity / u.factor * u2.factor)