From a11286a5091c0e8ac279265f8295ad819c336379 Mon Sep 17 00:00:00 2001
From: Tom Foster <tom@tcpip.uk>
Date: Mon, 13 Jan 2025 19:43:21 +0000
Subject: [PATCH] Add `M_MISSING_PARAM` error

---
 proposals/4133-extended-profiles.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/proposals/4133-extended-profiles.md b/proposals/4133-extended-profiles.md
index 8a4794fceb..3228bfb19c 100644
--- a/proposals/4133-extended-profiles.md
+++ b/proposals/4133-extended-profiles.md
@@ -193,6 +193,15 @@ demonstrates the process of defining new fields in the `m.*` namespace.
 }
 ```
 
+- **`M_MISSING_PARAM`**: Required parameter is missing, e.g. if a client attempts to set a profile field, but neglects to include that named field in the request body.
+
+```json
+{
+  "errcode": "M_MISSING_PARAM",
+  "error": "A required parameter is missing: {parameter_name}."
+}
+```
+
 - **`M_PROFILE_TOO_LARGE`**: Exceeds total profile size limits.
 
 ```json