diff --git a/reference/pdo/pdo/exec.xml b/reference/pdo/pdo/exec.xml
index f74f2be9e6..bbf4b0c68b 100644
--- a/reference/pdo/pdo/exec.xml
+++ b/reference/pdo/pdo/exec.xml
@@ -64,7 +64,7 @@
    <programlisting role="php">
 <![CDATA[
 <?php
-$db->exec() or die(print_r($db->errorInfo(), true));
+$db->exec() or die(print_r($db->errorInfo(), true)); // incorrect
 ?>
 ]]>
    </programlisting>