diff --git a/specification/compute/resource-manager/Microsoft.Compute/stable/2019-03-01/compute.json b/specification/compute/resource-manager/Microsoft.Compute/stable/2019-03-01/compute.json
index 67102ba29a32..469bb2a82808 100644
--- a/specification/compute/resource-manager/Microsoft.Compute/stable/2019-03-01/compute.json
+++ b/specification/compute/resource-manager/Microsoft.Compute/stable/2019-03-01/compute.json
@@ -5522,6 +5522,10 @@
         "managedDisk": {
           "description": "The managed disk parameters.",
           "$ref": "#/definitions/ManagedDiskParameters"
+        },
+        "toBeDetached": {
+          "type": "boolean",
+          "description":  "Specifies whether the datadisk is in process of detachment from the VirtualMachine/VirtualMachineScaleset"
         }
       },
       "required": [
diff --git a/specification/compute/resource-manager/Microsoft.Compute/stable/2019-03-01/examples/CreateAVmWithEmptyDataDisks.json b/specification/compute/resource-manager/Microsoft.Compute/stable/2019-03-01/examples/CreateAVmWithEmptyDataDisks.json
index db4be842f254..9e5e380836c4 100644
--- a/specification/compute/resource-manager/Microsoft.Compute/stable/2019-03-01/examples/CreateAVmWithEmptyDataDisks.json
+++ b/specification/compute/resource-manager/Microsoft.Compute/stable/2019-03-01/examples/CreateAVmWithEmptyDataDisks.json
@@ -177,7 +177,8 @@
                 },
                 "createOption": "Empty",
                 "lun": 0,
-                "diskSizeGB": 1023
+                "diskSizeGB": 1023,
+                "toBeDetached": false
               },
               {
                 "caching": "None",
@@ -186,7 +187,8 @@
                 },
                 "createOption": "Empty",
                 "lun": 1,
-                "diskSizeGB": 1023
+                "diskSizeGB": 1023,
+                "toBeDetached": false
               }
             ]
           },