diff --git a/ext/mysqli/tests/gh9590.phpt b/ext/mysqli/tests/gh9590.phpt
index a41cb310bef..eda5dbd844b 100644
--- a/ext/mysqli/tests/gh9590.phpt
+++ b/ext/mysqli/tests/gh9590.phpt
@@ -2,6 +2,7 @@
 Bug GH-9602 (stream_select does not abort upon exception or empty valid fd set)
 --EXTENSIONS--
 mysqli
+posix
 --SKIPIF--
 <?php
 require_once('skipifconnectfailure.inc');