diff --git a/cdn.module b/cdn.module
index 5083815..8bf242f 100644
--- a/cdn.module
+++ b/cdn.module
@@ -264,6 +264,14 @@ function cdn_cdn_unique_file_identifier_info() {
       'filesystem'   => FALSE,
       'callback'     => '_cdn_ufi_deployment_id',
     ),
+    'cache' => array(
+      'label'        => t('Cache'),
+      'machine_name' => 'cache',
+      'prefix'       => 'cache',
+      'description'  => t('Generates a new ID each time the cache is flushed.'),
+      'filesystem'   => FALSE,
+      'value'        => variable_get('css_js_query_string', 0),
+    ),
   );
 }