diff --git a/specification/advisor/resource-manager/Microsoft.Advisor/stable/2020-01-01/advisor.json b/specification/advisor/resource-manager/Microsoft.Advisor/stable/2020-01-01/advisor.json
index 79c4e4c96d42..789f65d262af 100644
--- a/specification/advisor/resource-manager/Microsoft.Advisor/stable/2020-01-01/advisor.json
+++ b/specification/advisor/resource-manager/Microsoft.Advisor/stable/2020-01-01/advisor.json
@@ -46,7 +46,8 @@
             "description": "Client sent unknown metadata name",
             "schema": {
               "$ref": "#/definitions/ARMErrorResponseBody"
-            }
+            },
+            "x-ms-error-response": true
           },
           "default": {
             "description": "Error response describing why the operation failed.",
@@ -589,7 +590,8 @@
             "description": "Suppression name is not specified or Suppression Id not found.",
             "schema": {
               "$ref": "#/definitions/ArmErrorResponse"
-            }
+            },
+            "x-ms-error-response": true
           },
           "default": {
             "description": "Error response describing why the operation failed.",
@@ -657,7 +659,8 @@
             "description": "Recommendation to be suppressed is not found.",
             "schema": {
               "$ref": "#/definitions/ArmErrorResponse"
-            }
+            },
+            "x-ms-error-response": true
           },
           "default": {
             "description": "Error response describing why the operation failed.",