diff --git a/share/sgml/man-refs.ent b/share/sgml/man-refs.ent
index c90939a86a..5a25ec73fb 100644
--- a/share/sgml/man-refs.ent
+++ b/share/sgml/man-refs.ent
@@ -3495,6 +3495,7 @@
 <!ENTITY man.snd.4 "<citerefentry/<refentrytitle/snd/<manvolnum/4//">
 <!ENTITY man.snd.ad1816.4 "<citerefentry/<refentrytitle/snd_ad1816/<manvolnum/4//">
 <!ENTITY man.snd.als4000.4 "<citerefentry/<refentrytitle/snd_als4000/<manvolnum/4//">
+<!ENTITY man.snd.audiocs.4 "<citerefentry/<refentrytitle/snd_audiocs/<manvolnum/4//">
 <!ENTITY man.snd.cmi.4 "<citerefentry/<refentrytitle/snd_cmi/<manvolnum/4//">
 <!ENTITY man.snd.cs4281.4 "<citerefentry/<refentrytitle/snd_cs4281/<manvolnum/4//">
 <!ENTITY man.snd.csa.4 "<citerefentry/<refentrytitle/snd_csa/<manvolnum/4//">