diff --git a/docs/usage/configuration/config_documentation.md b/docs/usage/configuration/config_documentation.md
index 675c3aceab..c414a15016 100644
--- a/docs/usage/configuration/config_documentation.md
+++ b/docs/usage/configuration/config_documentation.md
@@ -321,7 +321,7 @@ include_profile_data_on_invite: false
 ### `include_profile_updates_in_sync`
 
 *(boolean)* Use this option to include updates of other users' profiles in sync responses, for users who share rooms.
-Note, requires an MSC4429 compatible client, and is currently limited to legacy sync and local users only. Defaults to `false`.
+Note, requires an [MSC4429](https://github.com/matrix-org/matrix-spec-proposals/pull/4429) compatible client, and is currently limited to legacy sync and local users only. Defaults to `false`.
 
 Example configuration:
 ```yaml
diff --git a/schema/synapse-config.schema.yaml b/schema/synapse-config.schema.yaml
index e2ef1b8909..60c905275e 100644
--- a/schema/synapse-config.schema.yaml
+++ b/schema/synapse-config.schema.yaml
@@ -241,8 +241,8 @@ properties:
       Use this option to include updates of other users' profiles in sync responses,
       for users who share rooms.
       
-      Note, requires an MSC4429 compatible client, and is currently limited to
-      legacy sync and local users only.
+      Note, requires an [MSC4429](https://github.com/matrix-org/matrix-spec-proposals/pull/4429)
+      compatible client, and is currently limited to legacy sync and local users only.
     default: false
     examples:
       - true