diff --git a/46.md b/46.md
index 56b8402..d4b5728 100644
--- a/46.md
+++ b/46.md
@@ -153,13 +153,13 @@ The `content` field is a JSON-RPC-like message that is [NIP-04](https://github.c
 {
     "id": <request_id>,
     "result": <results_string>,
-    "error": <error_string>
+    "error": <optional_error_string>
 }
 ```
 
 - `id` is the request ID that this response is for.
 - `results` is a string of the result of the call (this can be either a string or a JSON stringified object)
-- `error` is an error in string form.
+- `error`, _optionally_, it is an error in string form, if any. Its presence indicates an error with the request.
 
 ### Auth Challenges