diff --git a/tasks/main.yml b/tasks/main.yml
index b70f31c6a04ec05437e3bd9a9f1a14e67107c0cd..afb967be62d87f051a1ee36628e0b43f9e77d285 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -31,7 +31,9 @@
     group: root
     mode: 0440
     validate: /usr/sbin/visudo -cf %s
-  when: ( item.sudo = true )
+  when:
+    - ( item.sudo is defined)
+    - ( item.sudo == true )
   with_items: "{{ human_users }}"
 
 - name: Add user to groups