diff --git a/htdocs/projet/activity/perday.php b/htdocs/projet/activity/perday.php
index e018bc47446..f8e106a7e7e 100644
--- a/htdocs/projet/activity/perday.php
+++ b/htdocs/projet/activity/perday.php
@@ -258,6 +258,7 @@ llxHeader("",$title,"");
 
 print_barre_liste($title, $page, $_SERVER["PHP_SELF"], "", $sortfield, $sortorder, "", $num, '', 'title_project');
 
+$param=($mode?'&mode='.$mode:'');
 
 // Show navigation bar
 $nav ="<a href=\"?year=".$prev_year."&amp;month=".$prev_month."&amp;day=".$prev_day.$param."\">".img_previous($langs->trans("Previous"))."</a>\n";
diff --git a/htdocs/projet/activity/perweek.php b/htdocs/projet/activity/perweek.php
index 6ffc38cfbe9..619803ecbc3 100644
--- a/htdocs/projet/activity/perweek.php
+++ b/htdocs/projet/activity/perweek.php
@@ -236,6 +236,7 @@ llxHeader("",$title,"",'','','',array('/core/js/timesheet.js'));
 
 print_barre_liste($title, $page, $_SERVER["PHP_SELF"], "", $sortfield, $sortorder, "", $num, '', 'title_project');
 
+$param=($mode?'&amp;mode='.$mode:'');
 
 // Show navigation bar
 $nav ="<a href=\"?year=".$prev_year."&amp;month=".$prev_month."&amp;day=".$prev_day.$param."\">".img_previous($langs->trans("Previous"))."</a>\n";