diff --git a/tasks/firewall.yaml b/tasks/firewall.yaml
index c52725c..85d1f0b 100644
--- a/tasks/firewall.yaml
+++ b/tasks/firewall.yaml
@@ -8,10 +8,10 @@
     # set vars
     - name: "set vars"
       ansible.builtin.set_fact:
+        firewall_host_rules: []
         __firewall_enable: "{{ firewall_enable }}"
-        __firewall_all_rules: "{{ firewall_basic_rules | union(firewall_host_rules | default[]) }}"
+        __firewall_all_rules: "{{ firewall_basic_rules | union(firewall_host_rules)}}"
 
-    # debugging
     - name: "debug"
       ansible.builtin.debug:
         msg: "outside {{ firewall_enable }}"