diff --git a/share/sgml/man-refs.ent b/share/sgml/man-refs.ent
index 5655e24c5c..41c6825789 100644
--- a/share/sgml/man-refs.ent
+++ b/share/sgml/man-refs.ent
@@ -3510,6 +3510,7 @@
 <!ENTITY man.nge.4 "<citerefentry/<refentrytitle/nge/<manvolnum/4//">
 <!ENTITY man.nis.4 "<citerefentry/<refentrytitle/nis/<manvolnum/4//">
 <!ENTITY man.nmdm.4 "<citerefentry/<refentrytitle/nmdm/<manvolnum/4//">
+<!ENTITY man.npe.4 "<citerefentry/<refentrytitle/npe/<manvolnum/4//">
 <!ENTITY man.npx.4 "<citerefentry/<refentrytitle/npx/<manvolnum/4//">
 <!ENTITY man.nsp.4 "<citerefentry/<refentrytitle/nsp/<manvolnum/4//">
 <!ENTITY man.null.4 "<citerefentry/<refentrytitle/null/<manvolnum/4//">