diff -u b/core/includes/module.inc b/core/includes/module.inc
--- b/core/includes/module.inc
+++ b/core/includes/module.inc
@@ -170,8 +170,8 @@
       // It's important to retrieve these first because the rebuild calls
       // reset the system_list static.
       _system_list_warm('module', 'system', 'core/modules/system.module', TRUE);
-      $module_data = system_rebuild_module_data();
       $theme_data = system_rebuild_theme_data();
+      $module_data = system_rebuild_module_data();
       $lists = array(
         'module_enabled' => array(),
         'theme' => array(),