diff --git a/doc/guide/admin/install.sdf b/doc/guide/admin/install.sdf
index 77d5288ba5..1d4e7b5ab0 100644
--- a/doc/guide/admin/install.sdf
+++ b/doc/guide/admin/install.sdf
@@ -63,16 +63,18 @@ installation instructions provided with it.
 
 H3: {{TERM[expand]TLS}}
 
-OpenLDAP clients and servers require installation of {{PRD:OpenSSL}}
+OpenLDAP clients and servers require installation of either {{PRD:OpenSSL}}
+or {{PRD:GnuTLS}}
 {{TERM:TLS}} libraries to provide {{TERM[expand]TLS}} services.  Though
 some operating systems may provide these libraries as part of the
-base system or as an optional software component, OpenSSL often
-requires separate installation.
+base system or as an optional software component, OpenSSL and GnuTLS often
+require separate installation.
 
 OpenSSL is available from {{URL: http://www.openssl.org/}}.
+GnuTLS is available from {{URL: http://www.gnu.org/software/gnutls/}}.
 
 OpenLDAP Software will not be fully LDAPv3 compliant unless OpenLDAP's
-{{EX:configure}} detects a usable OpenSSL installation.
+{{EX:configure}} detects a usable TLS library.
 
 
 H3: {{TERM[expand]SASL}}