diff --git a/plugins/modules/azure_rm_manageddisk.py b/plugins/modules/azure_rm_manageddisk.py
index ced449253..dc61444ea 100644
--- a/plugins/modules/azure_rm_manageddisk.py
+++ b/plugins/modules/azure_rm_manageddisk.py
@@ -152,6 +152,7 @@
         name: mymanageddisk
         location: eastus
         resource_group: myResourceGroup
+        managed_by: ''
         disk_size_gb: 4
 
     - name: Delete managed disk