diff --git a/lib/ansible/modules/monitoring/zabbix/zabbix_action.py b/lib/ansible/modules/monitoring/zabbix/zabbix_action.py
index 85fe3f8007..c881b3f7f6 100644
--- a/lib/ansible/modules/monitoring/zabbix/zabbix_action.py
+++ b/lib/ansible/modules/monitoring/zabbix/zabbix_action.py
@@ -169,11 +169,11 @@ options:
             - Works only with >= Zabbix 3.2
     acknowledge_default_message:
         description:
-            - Acknowledge operation message text.
+            - Update operation (known as "Acknowledge operation" before Zabbix 4.0) message text.
             - Works only with >= Zabbix 3.4
     acknowledge_default_subject:
         description:
-            - Acknowledge operation message subject.
+            - Update operation (known as "Acknowledge operation" before Zabbix 4.0) message subject.
             - Works only with >= Zabbix 3.4
     operations:
         type: list