Index: openacs-4/packages/calendar/tcl/calendar-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/calendar/tcl/calendar-procs.tcl,v
diff -u -r1.39.2.7 -r1.39.2.8
--- openacs-4/packages/calendar/tcl/calendar-procs.tcl	27 Jan 2023 15:26:55 -0000	1.39.2.7
+++ openacs-4/packages/calendar/tcl/calendar-procs.tcl	27 Jan 2023 15:37:21 -0000	1.39.2.8
@@ -446,7 +446,7 @@
 } {
     return the item types
 } {
-    return [list {--} {} {*}[db_list_of_lists select_item_types {}]]
+    return [list {{--} {}} {*}[db_list_of_lists select_item_types {}]]
 }
 
 ad_proc -public calendar::item_type_new {