diff --git a/tasks/main.yml b/tasks/main.yml
index 1c894f1..d24f4e4 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -114,7 +114,7 @@
     line: '%{{ ad_sudoers_group }} ALL=(ALL) NOPASSWD: ALL'
     state: present
     create: yes
-  when: ad_sudoers_group != ""
+  when: ad_sudoers_group is defined
 
 - name: Check if {{ ad_joinusr }}@{{ ad_domain }} exists
   shell: id {{ ad_joinusr }}@{{ ad_domain }}