1 files changed, 6 insertions, 0 deletions
diff --git a/README.md b/README.md
index c68122f..e1284a6 100644
--- a/README.md
+++ b/README.md
@@ -219,10 +219,16 @@ codes, all faulty WebSocket requests will receive error in the following format:
 {
   "type": "error",
   "id": 1,
+  "code": 500,
   "message": "Error message. Not machine-readable."
 }
 ```
 
+Parameters:
+
+* `.code` (int, HTTP status codes, always present): The machine-readable error code (e. g. 400 for Bad Request).
+* `.message` (string, any, always present): The human-readable error message.
+
 **`.type` and `.id` are included in every request / response, except for further noticed. Thus,
 this document excludes them from the parameter lists.**