diff --git modules/node/node.module modules/node/node.module
index d8f129f..8d2b885 100644
--- modules/node/node.module
+++ modules/node/node.module
@@ -2064,6 +2064,9 @@ function node_feed($nids = FALSE, $channel = array()) {
       ->execute()
       ->fetchCol();
   }
+  else if (!is_array($nids)) {
+    return MENU_NOT_FOUND;
+  }
 
   $item_length = variable_get('feed_item_length', 'fulltext');
   $namespaces = array('xmlns:dc' => 'http://purl.org/dc/elements/1.1/');