diff --git a/specification/recoveryservicessiterecovery/resource-manager/Microsoft.RecoveryServices/stable/2018-07-10/service.json b/specification/recoveryservicessiterecovery/resource-manager/Microsoft.RecoveryServices/stable/2018-07-10/service.json
index 61ba33e6eb91..942f9d440bf8 100644
--- a/specification/recoveryservicessiterecovery/resource-manager/Microsoft.RecoveryServices/stable/2018-07-10/service.json
+++ b/specification/recoveryservicessiterecovery/resource-manager/Microsoft.RecoveryServices/stable/2018-07-10/service.json
@@ -11018,6 +11018,10 @@
         "targetAvailabilitySetId": {
           "description": "The availability set ARM Id.",
           "type": "string"
+        },
+        "targetVmSize": {
+          "description": "The target VM size.",
+          "type": "string"
         }
       },
       "x-ms-discriminator-value": "HyperVReplicaAzure"
@@ -12293,6 +12297,10 @@
         "targetAvailabilitySetId": {
           "description": "The availability set ARM Id.",
           "type": "string"
+        },
+        "targetVmSize": {
+          "description": "The target VM size.",
+          "type": "string"
         }
       },
       "x-ms-discriminator-value": "InMageAzureV2"