diff --git a/changelogs/server_server/newsfragments/2100.clarification b/changelogs/server_server/newsfragments/2100.clarification
new file mode 100644
index 00000000..a488b392
--- /dev/null
+++ b/changelogs/server_server/newsfragments/2100.clarification
@@ -0,0 +1 @@
+Clarify that auth event of `content.join_authorised_via_users_server` is only necessary for `m.room.member` with a `membership` of `join`.
diff --git a/content/server-server-api.md b/content/server-server-api.md
index c82e3bee..41d32978 100644
--- a/content/server-server-api.md
+++ b/content/server-server-api.md
@@ -543,8 +543,8 @@ the following subset of the room state:
       `third_party_invite` property, the current
       `m.room.third_party_invite` event with `state_key` matching
       `content.third_party_invite.signed.token`, if any.
-    - If `content.join_authorised_via_users_server` is present,
-      and the [room version supports restricted rooms](/rooms/#feature-matrix),
+    - If `membership` is `join`, `content.join_authorised_via_users_server`
+      is present, and the [room version supports restricted rooms](/rooms/#feature-matrix),
       then the `m.room.member` event with `state_key` matching
       `content.join_authorised_via_users_server`.