diff --git a/valkey.conf b/valkey.conf
index 1261432c22..68f4ad1f72 100644
--- a/valkey.conf
+++ b/valkey.conf
@@ -513,6 +513,9 @@ rdb-del-sync-files no
 #
 # The Append Only File will also be created inside this directory.
 #
+# The Cluster config file is written relative this directory, if the
+# 'cluster-config-file' configuration directive is a relative path.
+#
 # Note that you must specify a directory here, not a file name.
 dir ./