diff --git a/example/includes/db.php b/example/includes/db.php
index 59f740f..cbeae5c 100644
--- a/example/includes/db.php
+++ b/example/includes/db.php
@@ -99,7 +99,7 @@ function update_item($id, $changes) {
   $item = get_item($id, true);
   if (!is_array($item)) return false;
 
-  if (isset($changes['date']) && !is_null($changes['date']))
+  if (isset($changes['date']) && $changes['date'])
     $changes['date'] = $db -> time2datetime($changes['date']);
 
   try {