diff --git a/reference/pdo/pdo/setattribute.xml b/reference/pdo/pdo/setattribute.xml
index 0739a74230..7ea47a743c 100644
--- a/reference/pdo/pdo/setattribute.xml
+++ b/reference/pdo/pdo/setattribute.xml
@@ -66,6 +66,13 @@
Cannot be used with persistent PDO instances.
Requires array(string classname, array(mixed constructor_args)).
+ PDO::ATTR_TIMEOUT:
+ Specifies the timeout duration in seconds. Not all drivers support this option,
+ and it's meaning may differ from driver to driver. For example, sqlite will wait
+ for up to this time value before giving up on obtaining an writable lock, but
+ other drivers may interpret this as a connect or a read timeout interval.
+ Requires int.
+
PDO::ATTR_AUTOCOMMIT
(available in OCI, Firebird and MySQL):
Whether to autocommit every single statement.