diff --git a/web/includes/functions.php b/web/includes/functions.php
index b4a5d0cc8..6e9c99402 100644
--- a/web/includes/functions.php
+++ b/web/includes/functions.php
@@ -1126,9 +1126,9 @@ function sortHeader($field, $querySep='&') {
     '?view='.$view,
     'page=1'.((isset($_REQUEST['filter']) and isset($_REQUEST['filter']['query'])) ? $_REQUEST['filter']['query'] : ''),
     'sort_field='.$field,
-    'sort_asc='.( ( isset($_REQUEST['sort_field']) and ( $_REQUEST['sort_field'] == $field ) ) ? !$_REQUEST['sort_asc'] : 0),
+    'sort_asc='.( ( isset($_REQUEST['sort_field']) and ( $_REQUEST['sort_field'] == $field ) ) ? !validInt($_REQUEST['sort_asc']) : 0),
     'limit='.(isset($_REQUEST['limit']) ? validInt($_REQUEST['limit']) : ''),
-    (isset($_REQUEST['eid']) ? 'eid='.$_REQUEST['eid'] : '' ),
+    (isset($_REQUEST['eid']) ? 'eid='.validCardinal($_REQUEST['eid']) : '' ),
   ));
 }