diff --git a/tasks/setupacdc.yml b/tasks/setupacdc.yml
index 7f8846d..bfdb9c4 100644
--- a/tasks/setupacdc.yml
+++ b/tasks/setupacdc.yml
@@ -58,7 +58,7 @@
           -protection {{ container_protection }} \
           -unprivileged {{ container_unprivileged }} \
           -tags "{{ container_tags | join(',') }}" \
-          -rootfs size=7G \
+          -rootfs 7G \
           -features {{ container_features }}
       args:
         creates: "/etc/pve/lxc/{{ container_id }}.conf"