diff --git a/spec/index.md b/spec/index.md
index 9f329d8c..81fa75be 100644
--- a/spec/index.md
+++ b/spec/index.md
@@ -679,7 +679,7 @@ The HTTP response to this request can have the following forms:
 
         -   `status` (`text`): `"replied"`
 
-        -   `reply` (`blob`):  A certificate (see [Certification](#certification)) with subtrees at `/request_status/<request_id>` and `/time`, where `<request_id>` is the [request ID](#request-id) of the update call. See [Request status](#state-tree-request-status) for more details on the request status.
+        -   `certificate` (`blob`):  A certificate (see [Certification](#certification)) with subtrees at `/request_status/<request_id>` and `/time`, where `<request_id>` is the [request ID](#request-id) of the update call. See [Request status](#state-tree-request-status) for more details on the request status.
 
     -   If a non-replicated pre-processing error occurred (e.g., due to the [canister inspect message](#system-api-inspect-message)), then a body with information about the IC specific error encountered is returned. The body is a CBOR map with the following fields: