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 450d22c6c39a..61ba33e6eb91 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
@@ -11014,6 +11014,10 @@
         "targetProximityPlacementGroupId": {
           "description": "The proximity placement group ARM Id.",
           "type": "string"
+        },
+        "targetAvailabilitySetId": {
+          "description": "The availability set ARM Id.",
+          "type": "string"
         }
       },
       "x-ms-discriminator-value": "HyperVReplicaAzure"
@@ -12285,6 +12289,10 @@
         "targetProximityPlacementGroupId": {
           "description": "The proximity placement group ARM Id.",
           "type": "string"
+        },
+        "targetAvailabilitySetId": {
+          "description": "The availability set ARM Id.",
+          "type": "string"
         }
       },
       "x-ms-discriminator-value": "InMageAzureV2"