diff --git a/specification/cognitiveservices/data-plane/Language/stable/2021-10-01/questionanswering-authoring.json b/specification/cognitiveservices/data-plane/Language/stable/2021-10-01/questionanswering-authoring.json
index 3c42db5abf75..b745dc978cc6 100644
--- a/specification/cognitiveservices/data-plane/Language/stable/2021-10-01/questionanswering-authoring.json
+++ b/specification/cognitiveservices/data-plane/Language/stable/2021-10-01/questionanswering-authoring.json
@@ -203,7 +203,8 @@
           "Successful query": {
             "$ref": "./examples/questionanswering/authoring/SuccessfulDeleteProject.json"
           }
-        }
+        },
+        "x-ms-long-running-operation": true
       }
     },
     "/query-knowledgebases/projects/deletion-jobs/{jobId}": {