diff --git a/cluster-http/src/main/resources/reference.conf b/cluster-http/src/main/resources/reference.conf
index a72c56b29..785a5acc6 100644
--- a/cluster-http/src/main/resources/reference.conf
+++ b/cluster-http/src/main/resources/reference.conf
@@ -28,6 +28,8 @@ akka.management {
 akka.management {
   health-checks {
     readiness-checks {
+      # Default health check for cluster. Overwrite the setting to replace it with
+      # your implementation or set it to "" (empty string) to disable this check.
       cluster-membership = "akka.management.cluster.scaladsl.ClusterMembershipCheck"
     }
   }