diff --git a/share/sgml/man-refs.ent b/share/sgml/man-refs.ent
index bb49230cc7..36ad0514d1 100644
--- a/share/sgml/man-refs.ent
+++ b/share/sgml/man-refs.ent
@@ -3760,6 +3760,7 @@
 <!ENTITY man.ethers.5 "<citerefentry/<refentrytitle/ethers/<manvolnum/5//">
 <!ENTITY man.euc.5 "<citerefentry/<refentrytitle/euc/<manvolnum/5//">
 <!ENTITY man.exports.5 "<citerefentry/<refentrytitle/exports/<manvolnum/5//">
+<!ENTITY man.ext2fs.5 "<citerefentry/<refentrytitle/ext2fs/<manvolnum/5//">
 <!ENTITY man.fbtab.5 "<citerefentry/<refentrytitle/fbtab/<manvolnum/5//">
 <!ENTITY man.fdesc.5 "<citerefentry/<refentrytitle/fdesc/<manvolnum/5//">
 <!ENTITY man.fdescfs.5 "<citerefentry/<refentrytitle/fdescfs/<manvolnum/5//">