diff --git a/debian/config.yml.in b/debian/config.yml.in
index 36b7bf1..a137fd1 100644
--- a/debian/config.yml.in
+++ b/debian/config.yml.in
@@ -41,6 +41,8 @@ bootstrap:
       use_pg_rewind: false
       remove_data_directory_on_diverged_timelines: true
 #      use_slots: true
+      # The following parameters are given as command line options
+      # overriding the settings in postgresql.conf.
       parameters:
 #        wal_level: hot_standby
 #        hot_standby: "on"