diff --git a/roles/vnstat/tasks/main.yml b/roles/vnstat/tasks/main.yml
index a26f19a2f..0c005ef16 100644
--- a/roles/vnstat/tasks/main.yml
+++ b/roles/vnstat/tasks/main.yml
@@ -19,6 +19,12 @@
   shell: /usr/bin/vnstat -i {{ iiab_lan_iface }}
   when: iiab_lan_iface is defined
 
+- name: "Add 'vnstat_installed: True' to {{ iiab_state_file }}"
+  lineinfile:
+    dest: "{{ iiab_state_file }}"    # /etc/iiab/iiab_state.yml
+    regexp: '^vnstat_installed'
+    line: 'vnstat_installed: True'
+
 - name: Enable & Start vnStat's systemd service
   systemd:
     name: vnstat