diff --git a/modules/locale/locale.install b/modules/locale/locale.install
index b4db757..cf690bb 100644
--- a/modules/locale/locale.install
+++ b/modules/locale/locale.install
@@ -219,6 +219,19 @@ function locale_update_7005() {
  */
 
 /**
+ * Update default language to include missing javascript key.
+ */
+function locale_update_7006() {
+  $default = variable_get('language_default', NULL);
+  if (!is_null($default)) {
+    if (!property_exists($default, 'javascript')) {
+      $default->javascript = '';
+      variable_set('language_default', $default);
+    }
+  }
+}
+
+/**
  * Implements hook_uninstall().
  */
 function locale_uninstall() {