diff --git a/src/lib/libc/hash/sha1.3 b/src/lib/libc/hash/sha1.3
index 6b1f4daf..04c90fce 100644
--- a/src/lib/libc/hash/sha1.3
+++ b/src/lib/libc/hash/sha1.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: sha1.3,v 1.20 2001/08/06 10:42:26 mpech Exp $
+.\"	$OpenBSD: sha1.3,v 1.21 2001/10/29 18:08:29 millert Exp $
 .\"
 .\" Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
 .\" All rights reserved.
@@ -206,6 +206,11 @@ helper functions are derived from code written by Poul-Henning Kamp.
 .%T The Secure Hash Standard
 .%O FIPS PUB 180-1
 .Re
+.Rs
+.%A D. Eastlake and P. Jones
+.%T US Secure Hash Algorithm 1
+.%O RFC 3174
+.Re
 .Sh HISTORY
 The SHA-1 functions appeared in
 .Ox 2.0 .