diff --git a/core/modules/system/lib/Drupal/system/Controller/SystemInfoController.php b/core/modules/system/lib/Drupal/system/Controller/SystemInfoController.php
index 3bc83ab..b4707c3 100644
--- a/core/modules/system/lib/Drupal/system/Controller/SystemInfoController.php
+++ b/core/modules/system/lib/Drupal/system/Controller/SystemInfoController.php
@@ -48,6 +48,8 @@ public function __construct(ModuleHandler $module_handler) {
    *
    * @param $check
    *   If true, only returns a boolean whether there are system status errors.
+   *
+   * @return bool|string
    */
   public function status($check = FALSE) {
     // Load .install files
@@ -56,7 +58,15 @@ public function status($check = FALSE) {
 
     // Check run-time requirements and status information.
     $requirements = $this->moduleHandler->invokeAll('requirements', array('runtime'));
-    usort($requirements, '_system_sort_requirements');
+    usort($requirements, function($a, $b) {
+      if (!isset($a['weight'])) {
+        if (!isset($b['weight'])) {
+          return strcmp($a['title'], $b['title']);
+        }
+        return -$b['weight'];
+      }
+      return isset($b['weight']) ? $a['weight'] - $b['weight'] : $a['weight'];
+    });
 
     if ($check) {
       return drupal_requirements_severity($requirements) == REQUIREMENT_ERROR;
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index b2d8663..294ed2d 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -3295,19 +3295,6 @@ function system_config_form_submit($form, &$form_state) {
 }
 
 /**
- * Helper function to sort requirements.
- */
-function _system_sort_requirements($a, $b) {
-  if (!isset($a['weight'])) {
-    if (!isset($b['weight'])) {
-      return strcmp($a['title'], $b['title']);
-    }
-    return -$b['weight'];
-  }
-  return isset($b['weight']) ? $a['weight'] - $b['weight'] : $a['weight'];
-}
-
-/**
  * Generates a form array for a confirmation form.
  *
  * This function returns a complete form array for confirming an action. The