diff --git a/en_US.ISO8859-1/share/sgml/authors.ent b/en_US.ISO8859-1/share/sgml/authors.ent
index d2e66dde1f..ce0a14ae94 100644
--- a/en_US.ISO8859-1/share/sgml/authors.ent
+++ b/en_US.ISO8859-1/share/sgml/authors.ent
@@ -794,6 +794,8 @@
 
 <!ENTITY a.matteo "Matteo Riondato <email>matteo@FreeBSD.org</email>">
 
+<!ENTITY a.matthew "Matthew Seaman <email>matthew@FreeBSD.org</email>">
+
 <!ENTITY a.matusita "Makoto Matsushita <email>matusita@FreeBSD.org</email>">
 
 <!ENTITY a.mav "Alexander Motin <email>mav@FreeBSD.org</email>">