diff --git a/core/lib/Drupal/Core/Config/ConfigInstaller.php b/core/lib/Drupal/Core/Config/ConfigInstaller.php
index c8defe7..4b8f5bc 100644
--- a/core/lib/Drupal/Core/Config/ConfigInstaller.php
+++ b/core/lib/Drupal/Core/Config/ConfigInstaller.php
@@ -138,6 +138,9 @@ protected function listDefaultConfigCollection($collection, $type, $name, array
     // Get all default configuration owned by this extension.
     $source_storage = $this->getSourceStorage($collection);
     $config_to_install = $source_storage->listAll($name . '.');
+    if ($source_storage->exists($name)) {
+      $config_to_install[] = $name;
+    }
 
     // If not installing the core base system default configuration, work out if
     // this extension provides default configuration for any other enabled