diff --git a/src/main/java/net/openhft/chronicle/map/DiscoveryCluster.java b/src/main/java/net/openhft/chronicle/map/DiscoveryCluster.java
index 37bc7f66c..460f33585 100644
--- a/src/main/java/net/openhft/chronicle/map/DiscoveryCluster.java
+++ b/src/main/java/net/openhft/chronicle/map/DiscoveryCluster.java
@@ -139,11 +139,14 @@ public class DiscoveryCluster {
             @Override
             public boolean isIdentifierUnique(byte remoteIdentifier, SocketAddress remoteAddress) {
                 final SocketAddress socketAddress = identifiers.putIfAbsent(remoteIdentifier, remoteAddress);
+                remoteNodes.activeIdentifierBitSet().set(remoteIdentifier);
                 return socketAddress == null;
             }
         };
 
 
+        remoteNodes.activeIdentifierBitSet().set(identifier);
+
         final TcpReplicationConfig tcpConfig = TcpReplicationConfig
                 .of(tcpPort, toInetSocketArray(knownHostPorts))
                 .heartBeatInterval(1, SECONDS).nonUniqueIdentifierListener(identifierListener);