diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 22aed3e..9aa9f89 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -702,7 +702,7 @@ function theme_get_setting($setting_name, $theme = NULL) {
       // Generate the path to the logo image.
       $logo_path = $cache[$theme]->get('logo.path');
       if ($cache[$theme]->get('logo.use_default')) {
-        $cache[$theme]->set('logo.url', file_create_url(dirname($theme_object->filename) . '/logo.png'));
+        $cache[$theme]->set('logo.url', file_create_url($theme_object->getPath() . '/logo.png'));
       }
       elseif ($logo_path) {
         $cache[$theme]->set('logo.url', file_create_url($logo_path));