diff --git a/specification/attestation/resource-manager/Microsoft.Attestation/preview/2018-09-01-preview/attestation.json b/specification/attestation/resource-manager/Microsoft.Attestation/preview/2018-09-01-preview/attestation.json
index 9316d9a217a9..3813af740c8c 100644
--- a/specification/attestation/resource-manager/Microsoft.Attestation/preview/2018-09-01-preview/attestation.json
+++ b/specification/attestation/resource-manager/Microsoft.Attestation/preview/2018-09-01-preview/attestation.json
@@ -474,6 +474,7 @@
             "$ref": "#/definitions/AttestationProvider"
           }
         }
+      }
     },
     "AttestationServicePatchParams": {
       "description": "Parameters for patching an attestation service instance",