diff --git a/roles/sap_ha_pacemaker_cluster/defaults/main.yml b/roles/sap_ha_pacemaker_cluster/defaults/main.yml
index c4bdd5f66..7726ec60c 100644
--- a/roles/sap_ha_pacemaker_cluster/defaults/main.yml
+++ b/roles/sap_ha_pacemaker_cluster/defaults/main.yml
@@ -79,6 +79,9 @@ sap_ha_pacemaker_cluster_resource_defaults: {}
 # nwas_abap_ascs_ers
 # nwas_abap_pas_aas
 # nwas_java_scs_ers     (maybe)
+#
+# 'sap_ha_pacemaker_cluster_host_type' is converted from string to list type in
+# 'tasks/ascertain_sap_landscape.yml'.
 sap_ha_pacemaker_cluster_host_type: "{{ sap_host_type | default(['hana_scaleup_perf']) }}"
 sap_ha_pacemaker_cluster_replication_type: none