diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index ac8167632bc2d5043495aa4c1bd15b88aa0843f0..b96374ccc765418ae0002bf2f419eb57de2c42de 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -1121,7 +1121,7 @@ function system_library_info() {
     'title' => 'Drupal progress indicator',
     'version' => VERSION,
     'js' => array(
-      'core/misc/progress.js' => array('group' => JS_DEFAULT, 'cache' => FALSE),
+      'core/misc/progress.js' => array('group' => JS_DEFAULT),
     ),
   );