diff --git a/x-pack/plugins/remote_clusters/common/lib/cluster_serialization.ts b/x-pack/plugins/remote_clusters/common/lib/cluster_serialization.ts
index fbea311cdeefa7..3b4ff8f5019bf6 100644
--- a/x-pack/plugins/remote_clusters/common/lib/cluster_serialization.ts
+++ b/x-pack/plugins/remote_clusters/common/lib/cluster_serialization.ts
@@ -157,7 +157,7 @@ export function serializeCluster(deserializedClusterObject: Cluster): ClusterPay
             mode: mode ?? null,
             proxy_address: proxyAddress ?? null,
             proxy_socket_connections: proxySocketConnections ?? null,
-            server_name: serverName ?? null,
+            server_name: serverName && serverName !== '' ? serverName : null,
             seeds: seeds ?? null,
             node_connections: nodeConnections ?? null,
           },