diff --git a/Documentation/dev-guide/apispec/swagger/rpc.swagger.json b/Documentation/dev-guide/apispec/swagger/rpc.swagger.json
index 9e3b2a520f6..3cbe12e9f1c 100644
--- a/Documentation/dev-guide/apispec/swagger/rpc.swagger.json
+++ b/Documentation/dev-guide/apispec/swagger/rpc.swagger.json
@@ -2982,7 +2982,7 @@
         },
         "canceled": {
           "type": "boolean",
-          "description": "canceled is set to true if the response is for a cancel watch request.\nNo further events will be sent to the canceled watcher."
+          "description": "canceled is set to true if the response is for a cancel watch request or if the start_revision has already been compacted.\nNo further events will be sent to the canceled watcher."
         },
         "compact_revision": {
           "type": "string",