diff --git a/src/aks-preview/HISTORY.rst b/src/aks-preview/HISTORY.rst
index d08a09727e1..c7798bdf700 100644
--- a/src/aks-preview/HISTORY.rst
+++ b/src/aks-preview/HISTORY.rst
@@ -12,6 +12,10 @@ To release a new version, please select a new version number (usually plus 1 to
 Pending
 +++++++
 
+0.5.128
++++++++
+* Fix option name `--duration` for command group `az aks maintenanceconfiguration`
+
 0.5.127
 +++++++
 * Add `--node-os-upgrade-channel <node os upgrade channel>` option for specifying the manner in which the OS on your nodes is updated in `aks create` and `aks update`
diff --git a/src/aks-preview/azext_aks_preview/maintenanceconfiguration.py b/src/aks-preview/azext_aks_preview/maintenanceconfiguration.py
index 6d70730ef8d..b8783be410e 100644
--- a/src/aks-preview/azext_aks_preview/maintenanceconfiguration.py
+++ b/src/aks-preview/azext_aks_preview/maintenanceconfiguration.py
@@ -97,7 +97,7 @@ def constructMaintenanceWindow(cmd, raw_parameters):
     if start_time is None:
         raise RequiredArgumentMissingError('Please specify --start-time for maintenance window.')
     if duration_hours is None:
-        raise RequiredArgumentMissingError('Please specify --duration-hours for maintenance window.')
+        raise RequiredArgumentMissingError('Please specify --duration for maintenance window.')
 
     MaintenanceWindow = cmd.get_models('MaintenanceWindow', resource_type=CUSTOM_MGMT_AKS_PREVIEW, operation_group='maintenance_configurations')
     maintenanceWindow = MaintenanceWindow(
diff --git a/src/aks-preview/azext_aks_preview/tests/latest/test_maintenanceconfiguration.py b/src/aks-preview/azext_aks_preview/tests/latest/test_maintenanceconfiguration.py
index a540c72707e..422dd33eadd 100644
--- a/src/aks-preview/azext_aks_preview/tests/latest/test_maintenanceconfiguration.py
+++ b/src/aks-preview/azext_aks_preview/tests/latest/test_maintenanceconfiguration.py
@@ -181,7 +181,7 @@ def test_add_dedicated_schedule_with_missing_options(self):
             "start_time": "00:00",
         }
 
-        err = ("Please specify --duration-hours for maintenance window.")
+        err = ("Please specify --duration for maintenance window.")
         with self.assertRaises(RequiredArgumentMissingError) as cm:
             mc.aks_maintenanceconfiguration_update_internal(cmd, None, raw_parameters)
         self.assertEqual(str(cm.exception), err)
diff --git a/src/aks-preview/setup.py b/src/aks-preview/setup.py
index ca280b7010c..1acbb04ffc9 100644
--- a/src/aks-preview/setup.py
+++ b/src/aks-preview/setup.py
@@ -9,7 +9,7 @@
 
 from setuptools import setup, find_packages
 
-VERSION = "0.5.127"
+VERSION = "0.5.128"
 
 CLASSIFIERS = [
     "Development Status :: 4 - Beta",