diff --git a/reference/pdo/pdo/rollback.xml b/reference/pdo/pdo/rollback.xml
index 5e3fa16566..27e7b15eeb 100644
--- a/reference/pdo/pdo/rollback.xml
+++ b/reference/pdo/pdo/rollback.xml
@@ -17,8 +17,8 @@
 
   <para>
    Rolls back the current transaction, as initiated by
-   <function>PDO::beginTransaction</function>.  It is an error to call this
-   method if no transaction is active.
+   <function>PDO::beginTransaction</function>. A <classname>PDOException</classname>
+   will be thrown if no transaction is active.
   </para>
   <para>
    If the database was set to autocommit mode, this function will restore