diff --git a/modules/ROOT/pages/clustering/setup/deploy.adoc b/modules/ROOT/pages/clustering/setup/deploy.adoc
index f56881821..e1485a756 100644
--- a/modules/ROOT/pages/clustering/setup/deploy.adoc
+++ b/modules/ROOT/pages/clustering/setup/deploy.adoc
@@ -253,6 +253,13 @@ If you want to follow along with the startup, you can see the messages in xref:c
 ======
 =====
 
+[CAUTION]
+====
+The setting
+xref:configuration/configuration-settings.adoc#config_dbms.cluster.minimum_initial_system_primaries_count[`dbms.cluster.minimum_initial_system_primaries_count`]
+must be set to `2` on all servers in case setting up a cluster with only *two* servers.
+====
+
 [[cluster-example-create-databases-on-cluster]]
 == Create new databases in a cluster