diff --git a/reference/pdo_cubrid/reference.xml b/reference/pdo_cubrid/reference.xml
index 7762f7c04a..7e28fcedd8 100644
--- a/reference/pdo_cubrid/reference.xml
+++ b/reference/pdo_cubrid/reference.xml
@@ -198,6 +198,16 @@ fpassthru($result[0]);
     </para>
    </refsect1>
 
+   <refsect1 role="notes">
+    &reftitle.notes;
+    <note>
+     <para>
+      When you estalish the connection to CUBRID, you should give username and
+      password except DSN.
+     </para>
+    </note>
+   </refsect1>
+
    <refsect1 role="examples">
     &reftitle.examples;
     <para>