diff --git a/include/staff/tickets.inc.php b/include/staff/tickets.inc.php
index cf19f45a36db6dcbee8303203c95e84109e2107c..200a13448eacfbc6aeb602e86f69558d89d45e01 100644
--- a/include/staff/tickets.inc.php
+++ b/include/staff/tickets.inc.php
@@ -87,7 +87,7 @@ case 'search':
                     'user__emails__address' => $_REQUEST['query'],
                 ));
             }
-            elseif (is_numeric($_REQUEST['query'])) {
+            elseif ($_REQUEST['query']) {
                 $tickets = $tickets->filter(array(
                     'number' => $_REQUEST['query'],
                 ));