Index: openacs-4/packages/new-portal/tcl/portal-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/new-portal/tcl/portal-procs.tcl,v
diff -u -N -r1.216.2.20 -r1.216.2.21
--- openacs-4/packages/new-portal/tcl/portal-procs.tcl	29 Jan 2023 12:31:58 -0000	1.216.2.20
+++ openacs-4/packages/new-portal/tcl/portal-procs.tcl	24 Jul 2023 13:08:29 -0000	1.216.2.21
@@ -2498,7 +2498,7 @@
             if {($option_val eq $thisoption_name && !$link_all) || !$thisoption_link_p} {
                 append html "${pre_selected_td_html}${pre_html}${thisoption_value}${post_selected_html}\n"
             } else {
-                set href $url?[export_vars -url -set $options_set [list [list $option_key $thisoption_name]]]
+                set href [export_vars -base $url -set $options_set [list [list $option_key $thisoption_name]]]
                 append html [subst {
                     ${pre_td_html}<a href="[ns_quotehtml $href]">${pre_html}${thisoption_value}${post_html}
                 }]