diff --git a/share/sgml/man-refs.ent b/share/sgml/man-refs.ent
index 1c3f332c6b..4d511ad8a4 100644
--- a/share/sgml/man-refs.ent
+++ b/share/sgml/man-refs.ent
@@ -2954,6 +2954,7 @@
 <!ENTITY man.ie.4 "<citerefentry/<refentrytitle/ie/<manvolnum/4//">
 <!ENTITY man.ifmib.4 "<citerefentry/<refentrytitle/ifmib/<manvolnum/4//">
 <!ENTITY man.ifpi.4 "<citerefentry/<refentrytitle/ifpi/<manvolnum/4//">
+<!ENTITY man.ifpi2.4 "<citerefentry/<refentrytitle/ifpi2/<manvolnum/4//">
 <!ENTITY man.ihfc.4 "<citerefentry/<refentrytitle/ihfc/<manvolnum/4//">
 <!ENTITY man.iic.4 "<citerefentry/<refentrytitle/iic/<manvolnum/4//">
 <!ENTITY man.iicbb.4 "<citerefentry/<refentrytitle/iicbb/<manvolnum/4//">