diff -u b/core/includes/theme.inc b/core/includes/theme.inc
--- b/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -379,7 +379,7 @@
       if ($cache[$theme]->get('features.logo')) {
         $logo_path = $cache[$theme]->get('logo.path');
         if ($cache[$theme]->get('logo.use_default')) {
-          $cache[$theme]->set('logo.url', file_create_url($theme_object->getPath() .'/logo.svg'));
+          $cache[$theme]->set('logo.url', file_create_url($theme_object->getPath() . '/logo.svg'));
         }
         elseif ($logo_path) {
           $cache[$theme]->set('logo.url', file_create_url($logo_path));