diff --git a/lib/krb5/krb5_string_to_key.3 b/lib/krb5/krb5_string_to_key.3
index be35ffa45..a520b999b 100644
--- a/lib/krb5/krb5_string_to_key.3
+++ b/lib/krb5/krb5_string_to_key.3
@@ -31,7 +31,7 @@
 .\"
 .\" $Id$
 .\"
-.Dd March 21, 2004
+.Dd April 22, 2004
 .Dt KRB5_STRING_TO_KEY 3
 .Os HEIMDAL
 .Sh NAME
@@ -138,6 +138,14 @@ is used to get the salt value.
 .Pp
 .Nm krb5_get_pw_salt
 get the default password salt for a principal.
+.Pp
+.Fn krb5_string_to_key_derived
+is deprecated, see the BUGS section below.
+.Sh BUGS
+.Fn krb5_string_to_key_derived
+only works for
+.Dv ETYPE_DES3_CBC_SHA1 ,
+if you use on on some other enctypes, it will produce the wrong result.
 .Sh SEE ALSO
 .Xr krb5 3 ,
 .Xr krb5_data 3 ,