diff --git a/share/sgml/man-refs.ent b/share/sgml/man-refs.ent
index 662b4ba919..bda1d68a01 100644
--- a/share/sgml/man-refs.ent
+++ b/share/sgml/man-refs.ent
@@ -4725,6 +4725,7 @@
 <!ENTITY man.md.initm.9 "<citerefentry/<refentrytitle/md_initm/<manvolnum/9//">
 <!ENTITY man.md.next.record.9 "<citerefentry/<refentrytitle/md_next_record/<manvolnum/9//">
 <!ENTITY man.mdchain.9 "<citerefentry/<refentrytitle/mdchain/<manvolnum/9//">
+<!ENTITY man.memguard.9 "<citerefentry/<refentrytitle/memguard/<manvolnum/9//">
 <!ENTITY man.mi.switch.9 "<citerefentry/<refentrytitle/mi_switch/<manvolnum/9//">
 <!ENTITY man.microseq.9 "<citerefentry/<refentrytitle/microseq/<manvolnum/9//">
 <!ENTITY man.microtime.9 "<citerefentry/<refentrytitle/microtime/<manvolnum/9//">