diff --git a/modules/node/node.install b/modules/node/node.install
index 43bfd53..76c2aec 100644
--- a/modules/node/node.install
+++ b/modules/node/node.install
@@ -114,6 +114,7 @@ function node_schema() {
       'uid'                 => array('uid'),
       'tnid'                => array('tnid'),
       'translate'           => array('translate'),
+      'language'            => array('language'),
     ),
     'unique keys' => array(
       'vid' => array('vid'),
@@ -926,5 +927,12 @@ function node_update_7013() {
 }
 
 /**
+ * Add an index on {node}.language.
+ */
+function node_update_7014() {
+  db_add_index('node', 'language', array('language'));
+}
+
+/**
  * @} End of "addtogroup updates-7.x-extra".
  */