diff --git a/modules/node/node.install b/modules/node/node.install
index a1f77bb..8575c34 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'),
@@ -902,3 +903,20 @@ function node_update_7012() {
 /**
  * @} End of "addtogroup updates-6.x-to-7.x"
  */
+
+/**
+ * @addtogroup updates-7.x-extra
+ * @{
+ */
+
+/**
+ * Add an index on {node}.language.
+ */
+function node_update_7013() {
+  db_add_index('node', 'language', array('language'));
+}
+
+/**
+ * @} End of "addtogroup updates-7.x-extra"
+ * The next series of updates should start at 8000.
+ */