diff --git a/src/main/java/net/openhft/chronicle/map/ReplicationHubFindByName.java b/src/main/java/net/openhft/chronicle/map/ReplicationHubFindByName.java
index 07f3e0a2d..b0a2625f5 100644
--- a/src/main/java/net/openhft/chronicle/map/ReplicationHubFindByName.java
+++ b/src/main/java/net/openhft/chronicle/map/ReplicationHubFindByName.java
@@ -71,6 +71,7 @@ class ReplicationHubFindByName<K> implements FindByName {
         int withChannelId = nextFreeChannel.incrementAndGet();
 
         try (MapKeyContext<MapInstanceBuilder> c = map.context(config.name)) {
+            c.updateLock().lock();
             MapInstanceBuilder value =
                     config.replicatedViaChannel(replicationHub.createChannel(withChannelId));
             boolean added = !c.containsKey();