diff --git a/doc/sgml/oper-guide/oprivs.sgml b/doc/sgml/oper-guide/oprivs.sgml
index 827a4b2..fb5213e 100644
--- a/doc/sgml/oper-guide/oprivs.sgml
+++ b/doc/sgml/oper-guide/oprivs.sgml
@@ -133,7 +133,7 @@
 	</para>
       </sect2>
       <sect2>
-	<title>unkline (U), unkline</title>
+	<title>unkline (U), unkline and undline</title>
 	<para>
 	  Allows using UNKLINE and UNDLINE.
 	</para>