diff --git a/share/sgml/man-refs.ent b/share/sgml/man-refs.ent
index bbdee6a8b6..6243ee68ff 100644
--- a/share/sgml/man-refs.ent
+++ b/share/sgml/man-refs.ent
@@ -3424,6 +3424,7 @@
 <!ENTITY man.null.4 "<citerefentry/<refentrytitle/null/<manvolnum/4//">
 <!ENTITY man.ohci.4 "<citerefentry/<refentrytitle/ohci/<manvolnum/4//">
 <!ENTITY man.oldcard.4 "<citerefentry/<refentrytitle/oldcard/<manvolnum/4//">
+<!ENTITY man.oltr.4 "<citerefentry/<refentrytitle/oltr/<manvolnum/4//">
 <!ENTITY man.opie.4 "<citerefentry/<refentrytitle/opie/<manvolnum/4//">
 <!ENTITY man.orm.4 "<citerefentry/<refentrytitle/orm/<manvolnum/4//">
 <!ENTITY man.pae.4 "<citerefentry/<refentrytitle/pae/<manvolnum/4//">