--- loncom/interface/domainprefs.pm	2019/07/18 18:28:52	1.363
+++ loncom/interface/domainprefs.pm	2019/07/23 01:30:35	1.364
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Handler to set domain-wide configuration settings
 #
-# $Id: domainprefs.pm,v 1.363 2019/07/18 18:28:52 raeburn Exp $
+# $Id: domainprefs.pm,v 1.364 2019/07/23 01:30:35 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -16895,6 +16895,10 @@ sub modify_coursecategories {
                     }
                     $resulttext .= '</ul></li>';
                 }
+                &Apache::lonnet::do_cache_new('cats',$dom,$cathash,3600);
+                if (ref($lastactref) eq 'HASH') {
+                    $lastactref->{'cats'} = 1;
+                }
             }
             $resulttext .= '</ul>';
             if ($changes{'unauth'} || $changes{'auth'}) {
@@ -19675,7 +19679,7 @@ sub devalidate_remote_domconfs {
     my %thismachine;
     map { $thismachine{$_} = 1; } &Apache::lonnet::current_machine_ids();
     my @posscached = ('domainconfig','domdefaults','ltitools','usersessions',
-                      'directorysrch','passwdconf');
+                      'directorysrch','passwdconf','cats');
     if (keys(%servers)) {
         foreach my $server (keys(%servers)) {
             next if ($thismachine{$server});