diff --git a/share/sgml/man-refs.ent b/share/sgml/man-refs.ent
index 47965e0ca1..ba9afbd52a 100644
--- a/share/sgml/man-refs.ent
+++ b/share/sgml/man-refs.ent
@@ -343,6 +343,7 @@
 <!ENTITY man.mkdep.1 "<citerefentry/<refentrytitle/mkdep/<manvolnum/1//">
 <!ENTITY man.mkdir.1 "<citerefentry/<refentrytitle/mkdir/<manvolnum/1//">
 <!ENTITY man.mkfifo.1 "<citerefentry/<refentrytitle/mkfifo/<manvolnum/1//">
+<!ENTITY man.mkfontdir.1 "<citerefentry vendor='xfree86'/<refentrytitle/mkfontdir/<manvolnum/1//">
 <!ENTITY man.mklocale.1 "<citerefentry/<refentrytitle/mklocale/<manvolnum/1//">
 <!ENTITY man.mkstr.1 "<citerefentry/<refentrytitle/mkstr/<manvolnum/1//">
 <!ENTITY man.mktemp.1 "<citerefentry/<refentrytitle/mktemp/<manvolnum/1//">