diff --git a/vars/main.yml b/vars/main.yml
index 8b213e8..14e2b58 100644
--- a/vars/main.yml
+++ b/vars/main.yml
@@ -5,3 +5,4 @@ powerdns:
     "pipe-letsencrypt-regex": "^_acme-challenge\\."
     "pipe-letsencrypt-command": "/usr/local/bin/pdns.py pdns_backend"
     "pipe-letsencrypt-abi-version": "1"
+    "zone-cache-refresh-interval": "{{ omit if ansible_distribution_release == 'bullseye' else '0' }}"