diff --git a/changelogs/fragments/389-datadog_monitor-corrects-deprecated-message-param.yml b/changelogs/fragments/389-datadog_monitor-corrects-deprecated-message-param.yml
new file mode 100644
index 0000000000..db8c6e2448
--- /dev/null
+++ b/changelogs/fragments/389-datadog_monitor-corrects-deprecated-message-param.yml
@@ -0,0 +1,2 @@
+bugfixes:
+    - datadog_monitor - Corrects ``_update_monitor`` to use ``notification_message`` insteade of deprecated ``message`` (https://github.com/ansible-collections/community.general/pull/389).
diff --git a/plugins/modules/monitoring/datadog/datadog_monitor.py b/plugins/modules/monitoring/datadog/datadog_monitor.py
index e14081b307..64a69987d0 100644
--- a/plugins/modules/monitoring/datadog/datadog_monitor.py
+++ b/plugins/modules/monitoring/datadog/datadog_monitor.py
@@ -301,7 +301,7 @@ def _update_monitor(module, monitor, options):
     try:
         kwargs = dict(id=monitor['id'], query=module.params['query'],
                       name=_fix_template_vars(module.params['name']),
-                      message=_fix_template_vars(module.params['message']),
+                      message=_fix_template_vars(module.params['notification_message']),
                       escalation_message=_fix_template_vars(module.params['escalation_message']),
                       options=options)
         if module.params['tags'] is not None: