diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index 6b2158ecfa..d187a9a320 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -2293,8 +2293,9 @@ function install_config_import_batch() {
   // installed the system module and created a new UUID.
   $system_site = $sync->read('system.site');
   // When installing from configuration it is possible that system.site
-  // configuration is not present. If this occurs then the error will cause
-  // a ConfigImporterException and configuration import will fail.
+  // configuration is not present. If this occurs a ConfigImporterException will
+  // by thrown when $config_importer->initialize() is called below and the error
+  // will be reported to the user.
   if ($system_site !== FALSE) {
     \Drupal::configFactory()->getEditable('system.site')->set('uuid', $system_site['uuid'])->save();
   }