diff --git a/roles/munin/tasks/main.yml b/roles/munin/tasks/main.yml
index dd7570993..8812ddf01 100644
--- a/roles/munin/tasks/main.yml
+++ b/roles/munin/tasks/main.yml
@@ -1,6 +1,6 @@
-- name: Install Munin if it does not appear installed in {{ iiab_state_file }}    # /etc/iiab/iiab_state.yml
+- name: Install Munin if 'munin_installed' is not defined in {{ iiab_state_file }}    # /etc/iiab/iiab_state.yml
   include_tasks: install.yml
-  when: not munin_installed is defined
+  when: munin_installed is undefined
 
 - name: Enable or Disable Munin
   include_tasks: enable-or-disable.yml