diff --git a/readme.md b/readme.md
index f9040e8..0ee7980 100644
--- a/readme.md
+++ b/readme.md
@@ -60,6 +60,11 @@ unbound_zones:
         weight: 60
         port: 5060
         value: "server1.internal.example.com"
+
+      # PTR record (manual reverse DNS)
+      - name: "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa"
+        type: "PTR"
+        value: "server1.internal.example.com"
 ```
 
 ## Supported Record Types