diff --git a/htdocs/contact/agenda.php b/htdocs/contact/agenda.php
index 1984097d3cb..23a6042fbf9 100644
--- a/htdocs/contact/agenda.php
+++ b/htdocs/contact/agenda.php
@@ -242,7 +242,7 @@ if (is_object($objcanvas) && $objcanvas->displayCanvasExists($action))
         {
 			if (is_object($objthirdparty) && get_class($objthirdparty) == 'Societe') $out .= '&originid='.$objthirdparty->id.($objthirdparty->id > 0 ? '&socid='.$objthirdparty->id : '');
 			$out .= (!empty($objcon->id) ? '&contactid='.$objcon->id : '').'&origin=contact&originid='.$object->id.'&percentage=-1&backtopage='.urlencode($_SERVER['PHP_SELF'].($objcon->id > 0 ? '?id='.$objcon->id : ''));
-			$out .= '&datep='.dol_print_date(dol_now(), 'dayhourlog');
+			$out .= '&datep='.urlencode(dol_print_date(dol_now(), 'dayhourlog'));
     	}
 
     	$newcardbutton = '';