diff --git a/share/sgml/man-refs.ent b/share/sgml/man-refs.ent
index ef098fc136..51a3aefc26 100644
--- a/share/sgml/man-refs.ent
+++ b/share/sgml/man-refs.ent
@@ -3575,6 +3575,7 @@
 <!ENTITY man.snd.ich.4 "<citerefentry/<refentrytitle/snd_ich/<manvolnum/4//">
 <!ENTITY man.snd.maestro.4 "<citerefentry/<refentrytitle/snd_maestro/<manvolnum/4//">
 <!ENTITY man.snd.maestro3.4 "<citerefentry/<refentrytitle/snd_maestro3/<manvolnum/4//">
+<!ENTITY man.snd.mss.4 "<citerefentry/<refentrytitle/snd_mss/<manvolnum/4//">
 <!ENTITY man.snd.neomagic.4 "<citerefentry/<refentrytitle/snd_neomagic/<manvolnum/4//">
 <!ENTITY man.snd.sbc.4 "<citerefentry/<refentrytitle/snd_sbc/<manvolnum/4//">
 <!ENTITY man.snd.solo.4 "<citerefentry/<refentrytitle/snd_solo/<manvolnum/4//">