diff --git a/antispam.module b/antispam.module
index 9b94535..4b61497 100644
--- a/antispam.module
+++ b/antispam.module
@@ -1177,6 +1177,7 @@
   }
 
   if (!isset($moderator_types[$account->uid])) {
+    $moderator_types[$account->uid] = array();
     if (user_access('administer nodes', $account)) {
       foreach ($node_types as $type => $name) {
         $moderator_types[$account->uid][$type] = $name;