diff --git a/tasks/main.yml b/tasks/main.yml
index d83e92b..486a0fd 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -56,7 +56,7 @@
       export RESTIC_PASSWORD={{ restic_password }}
 
       restic backup /home/andreas --exclude-file=/etc/restic/excludes.txt
-  when: docker_skip_project or "'docker' not in group_names"
+  when: docker_skip_project is defined or "'docker' not in group_names"
 
 - name: "Create the restic config dir"
   file: