diff --git a/specification/containerservice/resource-manager/Microsoft.ContainerService/stable/2021-08-01/managedClusters.json b/specification/containerservice/resource-manager/Microsoft.ContainerService/stable/2021-08-01/managedClusters.json
index b90abe42e4df..73eeeba75e45 100644
--- a/specification/containerservice/resource-manager/Microsoft.ContainerService/stable/2021-08-01/managedClusters.json
+++ b/specification/containerservice/resource-manager/Microsoft.ContainerService/stable/2021-08-01/managedClusters.json
@@ -3540,6 +3540,11 @@
         "securityProfile": {
           "$ref": "#/definitions/ManagedClusterSecurityProfile",
           "description": "Security profile for the managed cluster."
+        },
+        "publicNetworkAccess": {
+          "type": "string",
+          "title": "Whether the cluster can be accessed through public network or not",
+          "description": "Default value is 'Enabled' (case insensitive). Could be set to 'Disabled' to enable private cluster"
         }
       },
       "description": "Properties of the managed cluster."