diff --git a/UPGRADE.txt b/UPGRADE.txt
index 84e2c7bbd1..b431693d0f 100644
--- a/UPGRADE.txt
+++ b/UPGRADE.txt
@@ -102,6 +102,11 @@ AMI:
    ConfbridgeMute, ConfbridgeUnmute, ConfbridgeTalking, BlindTransfer,
    AttendedTransfer, BridgeCreate, BridgeDestroy, BridgeEnter, BridgeLeave
 
+ - MixMonitor AMI actions now require users to have authorization classes.
+   * MixMonitor - system
+   * MixMonitorMute - call or system
+   * StopMixMonitor - call or system
+
 CDRs:
  - The "endbeforehexten" setting now defaults to "yes", instead of "no".
    When set to "no", yhis setting will cause a new CDR to be generated when a
diff --git a/apps/app_mixmonitor.c b/apps/app_mixmonitor.c
index 8013c8c684..ab1d0bad18 100644
--- a/apps/app_mixmonitor.c
+++ b/apps/app_mixmonitor.c
@@ -1518,9 +1518,9 @@ static int load_module(void)
 	ast_cli_register_multiple(cli_mixmonitor, ARRAY_LEN(cli_mixmonitor));
 	res = ast_register_application_xml(app, mixmonitor_exec);
 	res |= ast_register_application_xml(stop_app, stop_mixmonitor_exec);
-	res |= ast_manager_register_xml("MixMonitorMute", 0, manager_mute_mixmonitor);
-	res |= ast_manager_register_xml("MixMonitor", 0, manager_mixmonitor);
-	res |= ast_manager_register_xml("StopMixMonitor", 0, manager_stop_mixmonitor);
+	res |= ast_manager_register_xml("MixMonitorMute", EVENT_FLAG_SYSTEM | EVENT_FLAG_CALL, manager_mute_mixmonitor);
+	res |= ast_manager_register_xml("MixMonitor", EVENT_FLAG_SYSTEM, manager_mixmonitor);
+	res |= ast_manager_register_xml("StopMixMonitor", EVENT_FLAG_SYSTEM | EVENT_FLAG_CALL, manager_stop_mixmonitor);
 	res |= ast_custom_function_register(&mixmonitor_function);
 	res |= set_mixmonitor_methods();