Index: openacs-4/packages/ajaxhelper/tcl/ajax-listbuilder-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/ajaxhelper/tcl/ajax-listbuilder-procs.tcl,v
diff -u -N -r1.6.2.1 -r1.6.2.2
--- openacs-4/packages/ajaxhelper/tcl/ajax-listbuilder-procs.tcl	14 Feb 2019 16:15:00 -0000	1.6.2.1
+++ openacs-4/packages/ajaxhelper/tcl/ajax-listbuilder-procs.tcl	5 Oct 2019 13:08:44 -0000	1.6.2.2
@@ -378,7 +378,7 @@
     }
 	template::list::get_reference -name $___list_name
 	foreach elm $list_properties(elements) {
-	    if {[lsearch {checkbox} $elm] < 0} {
+	    if {$elm ni {checkbox}} {
 		template::list::element::get_reference -list_name $___list_name -element_name $elm
 		set element_properties(hide_p) 0
 	    }