diff --git a/htdocs/projet/activity/perday.php b/htdocs/projet/activity/perday.php
index 6a556fcae3f..85848eefedc 100644
--- a/htdocs/projet/activity/perday.php
+++ b/htdocs/projet/activity/perday.php
@@ -507,10 +507,10 @@ $tmparray = dol_getdate($daytoparse,true);	// detail of current day
 $idw = $tmparray['wday'];
 
 $cssweekend='';
-/*if (($idw + 1) < $numstartworkingday || ($idw + 1) > $numendworkingday)	// This is a day is not inside the setup of working days, so we use a week-end css.
+if (($idw + 1) < $numstartworkingday || ($idw + 1) > $numendworkingday)	// This is a day is not inside the setup of working days, so we use a week-end css.
 {
 	$cssweekend='weekend';
-}*/
+}
 
 print '<td class="center'.($cssweekend?' '.$cssweekend:'').'">'.$langs->trans("Duration").'</td>';
 print '<td class="center">'.$langs->trans("Note").'</td>';