diff --git a/website/source/docs/providers/azurerm/r/availability_set.html.markdown b/website/source/docs/providers/azurerm/r/availability_set.html.markdown
index 2cc8ff0e19..446444db76 100644
--- a/website/source/docs/providers/azurerm/r/availability_set.html.markdown
+++ b/website/source/docs/providers/azurerm/r/availability_set.html.markdown
@@ -44,6 +44,9 @@ The following arguments are supported:
 * `platform_update_domain_count` - (Optional) Specifies the number of update domains that are used. Defaults to 5.
 
 * `platform_fault_domain_count` - (Optional) Specifies the number of fault domains that are used. Defaults to 3.
+
+* `managed` - (Optional) Specifies whether the availability set is managed or not. Possible values are `true` (to specify aligned) or `false` (to specify classic). Default is `false`.
+
 * `tags` - (Optional) A mapping of tags to assign to the resource.
 
 ## Attributes Reference