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 -r1.36.2.3 -r1.36.2.4
--- openacs-4/packages/acs-subsite/lib/login.tcl	10 Sep 2015 08:21:34 -0000	1.36.2.3
+++ openacs-4/packages/acs-subsite/lib/login.tcl	30 May 2016 13:06:11 -0000	1.36.2.4
@@ -101,6 +101,8 @@
 	{time:text(hidden)}
 	{token_id:integer(hidden)}
 	{hash:text(hidden)}
+    } -validate {
+        { token_id {$token_id < 2**31} "invalid token id"}
     }
 
 set username_widget text