diff --git a/core/modules/config/lib/Drupal/config/Form/ConfigSingleExportForm.php b/core/modules/config/lib/Drupal/config/Form/ConfigSingleExportForm.php
index 21a5b57..e70bd40 100644
--- a/core/modules/config/lib/Drupal/config/Form/ConfigSingleExportForm.php
+++ b/core/modules/config/lib/Drupal/config/Form/ConfigSingleExportForm.php
@@ -78,12 +78,14 @@ public function buildForm(array $form, array &$form_state, $config_type = NULL,
         $this->definitions[$entity_type] = $definition;
       }
     }
-    $config_types = array(
-      'system.simple' => $this->t('Simple configuration'),
-    );
-    $config_types += array_map(function ($definition) {
+    $entity_types = array_map(function ($definition) {
       return $definition['label'];
     }, $this->definitions);
+    // Sort the entity types by label, then add the simple config to the top.
+    uasort($entity_types, 'strnatcasecmp');
+    $config_types = array(
+      'system.simple' => $this->t('Simple configuration'),
+    ) + $entity_types;
     $form['config_type'] = array(
       '#title' => $this->t('Configuration type'),
       '#type' => 'select',