diff --git a/htdocs/projet/tasks/time.php b/htdocs/projet/tasks/time.php
index 888bd4fb50b..debfb427111 100644
--- a/htdocs/projet/tasks/time.php
+++ b/htdocs/projet/tasks/time.php
@@ -469,10 +469,15 @@ if ($action == 'confirm_generateinvoice') {
 					$qtyhour = $value['timespent'] / 3600;
 					$qtyhourtext = convertSecondToTime($value['timespent'], 'all', $conf->global->MAIN_DURATION_OF_WORKDAY);
 
+					/*
 					// If no unit price known
 					if (empty($pu_ht)) {
 						$pu_ht = price2num($value['totalvaluetodivideby3600'] / 3600, 'MU');
 					}
+					*/
+
+					//Unit price
+					$pu_ht = price2num(($value['totalvaluetodivideby3600'] / $value['timespent']), 'MU');
 
 					// Add lines
 					$lineid = $tmpinvoice->addline($langs->trans("TimeSpentForInvoice", $username).' : '.$qtyhourtext, $pu_ht, round($qtyhour / $prodDurationHours, 2), $txtva, $localtax1, $localtax2, ($idprod > 0 ? $idprod : 0));