diff --git a/reference/requirements.rst b/reference/requirements.rst
index 7c168fc30f3..27fd45bfc79 100644
--- a/reference/requirements.rst
+++ b/reference/requirements.rst
@@ -41,7 +41,7 @@ Optional
   * ``short_open_tag = Off``
   * ``magic_quotes_gpc = Off``
   * ``register_globals = Off``
-  * ``session.autostart = Off``
+  * ``session.auto_start = Off``
 
 Doctrine
 --------