diff --git a/ext/sockets/tests/gh21161.phpt b/ext/sockets/tests/gh21161.phpt
index 8a3958a583d9..f8dbe909c8d6 100644
--- a/ext/sockets/tests/gh21161.phpt
+++ b/ext/sockets/tests/gh21161.phpt
@@ -7,6 +7,7 @@ sockets
 if (substr(PHP_OS, 0, 3) == 'WIN') {
     die('skip.. Not valid for Windows');
 }
+require 'ipv6_skipif.inc';
 ?>
 --FILE--
 <?php