diff --git a/specification/compute/resource-manager/Microsoft.Compute/stable/2019-07-01/compute.json b/specification/compute/resource-manager/Microsoft.Compute/stable/2019-07-01/compute.json
index a4149bcf65c1..0764640bdae7 100644
--- a/specification/compute/resource-manager/Microsoft.Compute/stable/2019-07-01/compute.json
+++ b/specification/compute/resource-manager/Microsoft.Compute/stable/2019-07-01/compute.json
@@ -9153,6 +9153,10 @@
           "type": "boolean",
           "description": "Specifies whether the Virtual Machine Scale Set should be overprovisioned."
         },
+        "doNotRunExtensionsOnOverprovisionedVMs": {
+          "type": "boolean",
+          "description": "When Overprovision is enabled, extensions are launched only on the requested number of VMs which are finally kept. This property will hence ensure that the extensions do not run on the extra overprovisioned VMs."
+        },
         "singlePlacementGroup": {
           "type": "boolean",
           "description": "When true this limits the scale set to a single placement group, of max size 100 virtual machines."