diff --git a/share/sgml/man-refs.ent b/share/sgml/man-refs.ent
index 2ed66507d6..ef098fc136 100644
--- a/share/sgml/man-refs.ent
+++ b/share/sgml/man-refs.ent
@@ -563,6 +563,7 @@
 <!ENTITY man.sha1.1 "<citerefentry/<refentrytitle/sha1/<manvolnum/1//">
 <!ENTITY man.shar.1 "<citerefentry/<refentrytitle/shar/<manvolnum/1//">
 <!ENTITY man.shift.1 "<citerefentry/<refentrytitle/shift/<manvolnum/1//">
+<!ENTITY man.shutdown.1 "<citerefentry/<refentrytitle/shutdown/<manvolnum/1//">
 <!ENTITY man.size.1 "<citerefentry/<refentrytitle/size/<manvolnum/1//">
 <!ENTITY man.skey.1 "<citerefentry/<refentrytitle/skey/<manvolnum/1//">
 <!ENTITY man.sleep.1 "<citerefentry/<refentrytitle/sleep/<manvolnum/1//">