diff --git a/core/modules/search/lib/Drupal/search/Form/SearchSettingsForm.php b/core/modules/search/lib/Drupal/search/Form/SearchSettingsForm.php
index a58bb00..bbcc9ea 100644
--- a/core/modules/search/lib/Drupal/search/Form/SearchSettingsForm.php
+++ b/core/modules/search/lib/Drupal/search/Form/SearchSettingsForm.php
@@ -234,7 +234,8 @@ public function submitForm(array &$form, array &$form_state) {
     $this->searchSettings->set('default_module', $form_state['values']['default_module']);
 
     // Handle per-plugin submission logic.
-    foreach ($this->searchPluginManager->getActivePlugins() as $plugin) {
+    $active_plugins = $this->searchPluginManager->getActivePlugins();
+    foreach ($active_plugins as $plugin) {
       $plugin->submitAdminForm($form, $form_state);
     }