diff --git a/en_US.ISO8859-1/share/sgml/authors.ent b/en_US.ISO8859-1/share/sgml/authors.ent
index 2e89fa6a2a..f687ac6bb0 100644
--- a/en_US.ISO8859-1/share/sgml/authors.ent
+++ b/en_US.ISO8859-1/share/sgml/authors.ent
@@ -754,6 +754,8 @@
 
 <!ENTITY a.swallace "Steven Wallace <email>swallace@FreeBSD.org</email>">
 
+<!ENTITY a.tackerman "Tony Ackerman <email>tackerman@FreeBSD.org</email>">
+
 <!ENTITY a.takawata "Takanori Watanabe <email>takawata@FreeBSD.org</email>">
 
 <!ENTITY a.tanimura "Seigo Tanimura <email>tanimura@FreeBSD.org</email>">