diff --git a/output/schema/schema.json b/output/schema/schema.json
index 009e7920fb..43bab19669 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -185443,6 +185443,19 @@
             }
           }
         },
+        {
+          "description": "If this value is true, the destination index is deleted together with the transform. If false, the destination\nindex will not be deleted",
+          "name": "delete_dest_index",
+          "required": false,
+          "serverDefault": false,
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "boolean",
+              "namespace": "_builtins"
+            }
+          }
+        },
         {
           "description": "Period to wait for a response. If no response is received before the timeout expires, the request fails and returns an error.",
           "name": "timeout",
@@ -185457,7 +185470,7 @@
           }
         }
       ],
-      "specLocation": "transform/delete_transform/DeleteTransformRequest.ts#L24-L51"
+      "specLocation": "transform/delete_transform/DeleteTransformRequest.ts#L24-L57"
     },
     {
       "body": {
diff --git a/output/schema/validation-errors.json b/output/schema/validation-errors.json
index 8deec10ece..d030b5d4ca 100644
--- a/output/schema/validation-errors.json
+++ b/output/schema/validation-errors.json
@@ -1413,9 +1413,7 @@
       "response": []
     },
     "transform.delete_transform": {
-      "request": [
-        "Request: missing json spec query parameter 'delete_dest_index'"
-      ],
+      "request": [],
       "response": [
         "response definition transform.delete_transform:Response / body / instance_of - Non-leaf type cannot be used here: '_types:AcknowledgedResponseBase'"
       ]
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index 49c54acb2b..7b7c8777ec 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -17724,6 +17724,7 @@ export interface TransformTimeSync {
 export interface TransformDeleteTransformRequest extends RequestBase {
   transform_id: Id
   force?: boolean
+  delete_dest_index?: boolean
   timeout?: Duration
 }
 
diff --git a/specification/transform/delete_transform/DeleteTransformRequest.ts b/specification/transform/delete_transform/DeleteTransformRequest.ts
index dd242e4df0..898474b29a 100644
--- a/specification/transform/delete_transform/DeleteTransformRequest.ts
+++ b/specification/transform/delete_transform/DeleteTransformRequest.ts
@@ -42,6 +42,12 @@ export interface Request extends RequestBase {
      * @server_default false
      */
     force?: boolean
+    /**
+     * If this value is true, the destination index is deleted together with the transform. If false, the destination
+     * index will not be deleted
+     * @server_default false
+     */
+    delete_dest_index?: boolean
     /**
      * Period to wait for a response. If no response is received before the timeout expires, the request fails and returns an error.
      * @server_default 30s