diff --git a/bin/expr/expr.1 b/bin/expr/expr.1
index c3a2819..891688b 100644
--- a/bin/expr/expr.1
+++ b/bin/expr/expr.1
@@ -30,7 +30,7 @@
 .\"
 .\" $FreeBSD: src/bin/expr/expr.1,v 1.9.2.4 2003/05/16 22:55:19 keramida Exp $
 .\"
-.Dd April 10, 2013
+.Dd August 23, 2016
 .Dt EXPR 1
 .Os
 .Sh NAME
@@ -136,3 +136,22 @@ The
 .Nm
 utility conforms to
 .St -p1003.2 .
+.Sh HISTORY
+An
+.Nm
+utility first appeared in the Programmer's Workbench (PWB/UNIX).
+A public domain version of
+.Nm
+written by
+.An Pace Willisson
+.Aq pace@blitz.com
+appeared in
+.Bx 386 0.1 .
+.Sh AUTHORS
+Initial implementation by
+.An Pace Willisson
+.Aq pace@blitz.com
+was largely rewritten by
+.An -nosplit
+.An J.T. Conklin
+.Aq jtc@FreeBSD.org .