diff --git a/doc/guide/preamble.sdf b/doc/guide/preamble.sdf
index dfb4bb15bf..4f2d253939 100644
--- a/doc/guide/preamble.sdf
+++ b/doc/guide/preamble.sdf
@@ -133,7 +133,7 @@ OpenSSL|http://www.openssl.org/
 Perl|http://www.perl.com/
 SASL|http://asg.web.cmu.edu/sasl/
 SQL|http://www.jcc.com/SQLPages/jccs_sql.htm
-TCL|http://www.scriptics.com/
+TCL|http://tcl.activestate.com/
 !endblock
 
 # Internet and X.500 terms