diff --git a/vars/default_vars.yml b/vars/default_vars.yml
index 3851f5704..f982c9513 100644
--- a/vars/default_vars.yml
+++ b/vars/default_vars.yml
@@ -380,8 +380,9 @@ moodle_enabled: False
 # If using Moodle intensively, set apache_high_php_limits in 3-BASE-SERVER
 
 # MongoDB (/library/dbdata/mongodb) is used by Sugarizer:
-# Its 2 settings below are auto-set to True (in roles/0-init/tasks/main.yml) when: sugarizer_enabled | bool
 # The mongodb playbook itself is later invoked by roles/sugarizer/meta/main.yml
+# 2019-07-08: mongodb_install is completely ignored.  FYI mongodb_enabled: False
+# works but is ineffective, as Sugarizer starts mongodb's systemd svc on its own
 mongodb_install: False
 mongodb_enabled: False
 mongodb_port: 27018