diff --git a/modules/node/node.install b/modules/node/node.install
index 3f732a4..38eb0dc 100644
--- a/modules/node/node.install
+++ b/modules/node/node.install
@@ -112,6 +112,7 @@ function node_schema() {
       'uid'                 => array('uid'),
       'tnid'                => array('tnid'),
       'translate'           => array('translate'),
+      'language'            => array('language'),
     ),
     'unique keys' => array(
       'vid' => array('vid'),