diff --git a/DnsServerCore/Dhcp/DhcpServer.cs b/DnsServerCore/Dhcp/DhcpServer.cs
index 0e752af2..3122e834 100644
--- a/DnsServerCore/Dhcp/DhcpServer.cs
+++ b/DnsServerCore/Dhcp/DhcpServer.cs
@@ -456,7 +456,7 @@ namespace DnsServerCore.Dhcp
 
                         //update hostname in reserved leases
                         {
-                            Lease reservedLease = scope.GetReservedLease(leaseOffer.ClientIdentifier);
+                            Lease reservedLease = scope.GetReservedLease(request);
                             if (reservedLease != null)
                                 reservedLease.SetHostName(request.HostName?.HostName);
                         }
diff --git a/DnsServerCore/Dhcp/Scope.cs b/DnsServerCore/Dhcp/Scope.cs
index fa701d08..d1179b6d 100644
--- a/DnsServerCore/Dhcp/Scope.cs
+++ b/DnsServerCore/Dhcp/Scope.cs
@@ -588,7 +588,12 @@ namespace DnsServerCore.Dhcp
             return GetReservedLease(new ClientIdentifierOption((byte)request.HardwareAddressType, request.ClientHardwareAddress));
         }
 
-        internal Lease GetReservedLease(ClientIdentifierOption clientIdentifier)
+        internal Lease GetReservedLease(DhcpMessageHardwareAddressType hardwareAddressType, byte[] identifier)
+        {
+            return GetReservedLease(new ClientIdentifierOption((byte)hardwareAddressType, identifier));
+        }
+
+        private Lease GetReservedLease(ClientIdentifierOption clientIdentifier)
         {
             if (_reservedLeases.TryGetValue(clientIdentifier, out Lease reservedLease))
             {