diff --git a/htdocs/core/lib/invoice.lib.php b/htdocs/core/lib/invoice.lib.php
index c64c63fc0dd..552658f091d 100644
--- a/htdocs/core/lib/invoice.lib.php
+++ b/htdocs/core/lib/invoice.lib.php
@@ -1165,6 +1165,7 @@ function getCustomerInvoiceUnpaidOpenTable($maxCount = 500, $socid = 0)
 						$i++;
 						$total += $obj->total_ht;
 						$total_ttc += $obj->total_ttc;
+						$totalam += $obj->am;
 						continue;
 					}