diff --git a/specification/cognitiveservices/resource-manager/Microsoft.CognitiveServices/stable/2017-04-18/cognitiveservices.json b/specification/cognitiveservices/resource-manager/Microsoft.CognitiveServices/stable/2017-04-18/cognitiveservices.json
index e804c1bd832f..933a30bedb07 100644
--- a/specification/cognitiveservices/resource-manager/Microsoft.CognitiveServices/stable/2017-04-18/cognitiveservices.json
+++ b/specification/cognitiveservices/resource-manager/Microsoft.CognitiveServices/stable/2017-04-18/cognitiveservices.json
@@ -433,6 +433,12 @@
             "schema": {
               "$ref": "#/definitions/ResourceSkusResult"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/Error"
+            }
           }
         },
         "x-ms-pageable": {
@@ -550,6 +556,12 @@
             "schema": {
               "$ref": "#/definitions/OperationEntityListResult"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/Error"
+            }
           }
         },
         "deprecated": false,
@@ -597,6 +609,12 @@
             "schema": {
               "$ref": "#/definitions/CheckSkuAvailabilityResultList"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/Error"
+            }
           }
         }
       }
@@ -637,6 +655,12 @@
             "schema": {
               "$ref": "#/definitions/CheckDomainAvailabilityResult"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/Error"
+            }
           }
         }
       }
@@ -718,6 +742,12 @@
             "schema": {
               "$ref": "#/definitions/PrivateEndpointConnection"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/Error"
+            }
           }
         }
       },
@@ -764,6 +794,12 @@
             "schema": {
               "$ref": "#/definitions/PrivateEndpointConnection"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/Error"
+            }
           }
         }
       },
@@ -801,6 +837,12 @@
           },
           "204": {
             "description": "No Content -- The private endpoint connection does not exist."
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/Error"
+            }
           }
         }
       }
@@ -837,6 +879,12 @@
             "schema": {
               "$ref": "#/definitions/PrivateLinkResourceListResult"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/Error"
+            }
           }
         }
       }