diff --git a/tasks/main.yml b/tasks/main.yml
index c6b9a71..149f1f5 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -6,6 +6,7 @@
     gid: "{{ user_groups[item].gid }}"
     state: present
   with_items: "{{ user_groups.keys() }}"
+  when: user_groups is defined
 
 - name: users primary group
   group: