diff --git a/modules/system/system.install b/modules/system/system.install
index b662040d6d3a15847426ed42181d7d5048d814f6..e067444604dce39df4909e36e21847f6f758a748 100644
--- a/modules/system/system.install
+++ b/modules/system/system.install
@@ -2952,6 +2952,19 @@ function system_update_7070() {
   variable_del('drupal_badge_size');
 }
 
+/**
+ * Add index missed during upgrade, and fix field default.
+ */
+function system_update_7071() {
+  db_drop_index('date_format_type', 'title');
+  db_add_index('date_format_type', 'title', array('title'));
+  db_change_field('registry', 'filename', 'filename', array(
+    'type' => 'varchar',
+    'length' => 255,
+    'not null' => TRUE,
+  ));
+}
+
 /**
  * @} End of "defgroup updates-6.x-to-7.x"
  * The next series of updates should start at 8000.