Index: openacs-4/packages/acs-admin/www/apm/version-callbacks.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-admin/www/apm/version-callbacks.tcl,v
diff -u -N -r1.10 -r1.11
--- openacs-4/packages/acs-admin/www/apm/version-callbacks.tcl	25 Apr 2018 19:23:25 -0000	1.10
+++ openacs-4/packages/acs-admin/www/apm/version-callbacks.tcl	9 May 2018 15:33:28 -0000	1.11
@@ -23,7 +23,7 @@
 if { [llength $unused_callback_types] > 0  } {
     set actions [list "\#acs-admin.Add_callback\#" [export_vars -base "version-callback-add-edit" { version_id }]]
 } else {
-    set actions {}
+    set actions [list]
 }