diff -u b/core/includes/theme.inc b/core/includes/theme.inc
--- b/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1335,7 +1335,7 @@
       // If the theme does not support a particular feature, override the global
       // setting and set the value to NULL.
       if (!empty($theme_object->info['features'])) {
-        foreach ($cache[$theme]->get('features') as $feature => $enabled) {
+        foreach (_system_default_theme_features() as $feature => $enabled) {
           if (!in_array($feature, $theme_object->info['features'])) {
             $cache[$theme]->set('features.' . $feature, NULL);
           }