diff --git a/share/sgml/man-refs.ent b/share/sgml/man-refs.ent
index 74b5379e47..816e34bde2 100644
--- a/share/sgml/man-refs.ent
+++ b/share/sgml/man-refs.ent
@@ -3539,6 +3539,7 @@
 <!ENTITY man.mount.procfs.8 "<citerefentry/<refentrytitle/mount_procfs/<manvolnum/8//">
 <!ENTITY man.mount.smbfs.8 "<citerefentry/<refentrytitle/mount_smbfs/<manvolnum/8//">
 <!ENTITY man.mount.std.8 "<citerefentry/<refentrytitle/mount_std/<manvolnum/8//">
+<!ENTITY man.mount.udf.8 "<citerefentry/<refentrytitle/mount_udf/<manvolnum/8//">
 <!ENTITY man.mount.umap.8 "<citerefentry/<refentrytitle/mount_umap/<manvolnum/8//">
 <!ENTITY man.mount.union.8 "<citerefentry/<refentrytitle/mount_union/<manvolnum/8//">
 <!ENTITY man.mountd.8 "<citerefentry/<refentrytitle/mountd/<manvolnum/8//">