Index: openacs-4/packages/acs-subsite/www/shared/whos-online.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-subsite/www/shared/whos-online.tcl,v
diff -u -r1.13 -r1.14
--- openacs-4/packages/acs-subsite/www/shared/whos-online.tcl	26 Apr 2018 08:56:37 -0000	1.13
+++ openacs-4/packages/acs-subsite/www/shared/whos-online.tcl	9 May 2018 15:33:28 -0000	1.14
@@ -29,7 +29,7 @@
         }
     }
 
-set users {}
+set users [list]
 
 foreach user_id [whos_online::user_ids] {
     acs_user::get -user_id $user_id -array user