Index: openacs-4/packages/acs-subsite/lib/login.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-subsite/lib/login.tcl,v
diff -u -N -r1.36.2.8 -r1.36.2.9
--- openacs-4/packages/acs-subsite/lib/login.tcl	6 Jun 2017 15:01:46 -0000	1.36.2.8
+++ openacs-4/packages/acs-subsite/lib/login.tcl	10 Jun 2017 12:09:32 -0000	1.36.2.9
@@ -103,7 +103,7 @@
     -action "[subsite::get_url]register/" -form {
 	{return_url:text(hidden)}
 	{time:text(hidden)}
-        {host_node_id:text(hidden)}
+        {host_node_id:text(hidden),optional}
 	{token_id:integer(hidden)}
 	{hash:text(hidden)}
     } -validate {