diff --git a/DnsServerCore/Dns/Zones/AuthZoneInfo.cs b/DnsServerCore/Dns/Zones/AuthZoneInfo.cs
index 05de3920..801eaeb5 100644
--- a/DnsServerCore/Dns/Zones/AuthZoneInfo.cs
+++ b/DnsServerCore/Dns/Zones/AuthZoneInfo.cs
@@ -951,7 +951,7 @@ namespace DnsServerCore.Dns.Zones
             }
         }
 
-        public bool NotifyFailed
+        public string[] NotifyFailed
         {
             get
             {