diff --git a/reference/sphinx/setup.xml b/reference/sphinx/setup.xml
index 60e5ee21d7..e2aee37b1c 100644
--- a/reference/sphinx/setup.xml
+++ b/reference/sphinx/setup.xml
@@ -7,7 +7,7 @@
  <section xml:id="sphinx.requirements">
   &reftitle.required;
   <para>
-   PECL/sphinx requires PHP 5.1.3 or newer.
+   PECL/sphinx requires PHP 5.2.2 or newer.
   </para>
  </section>