diff --git a/core/lib/Drupal/Component/Uuid/Com.php b/core/lib/Drupal/Component/Uuid/Com.php
index 41cfba42ffec9d89518d10f12bfd7670c955ca0b..945a30b129486b0fba8967198b894e21b8d1a68f 100644
--- a/core/lib/Drupal/Component/Uuid/Com.php
+++ b/core/lib/Drupal/Component/Uuid/Com.php
@@ -15,6 +15,6 @@
 class Com implements UuidInterface {
   public function generate() {
     // Remove {} wrapper and make lower case to keep result consistent.
-    return drupal_strtolower(trim(com_create_guid(), '{}'));
+    return strtolower(trim(com_create_guid(), '{}'));
   }
 }