diff --git a/changelogs/room_versions/newsfragments/2199.feature b/changelogs/room_versions/newsfragments/2199.feature
new file mode 100644
index 00000000..88e57469
--- /dev/null
+++ b/changelogs/room_versions/newsfragments/2199.feature
@@ -0,0 +1 @@
+Add [room version 12](/rooms/v12) as per [MSC4304](https://github.com/matrix-org/matrix-spec-proposals/pull/4304).
diff --git a/content/rooms/v12.md b/content/rooms/v12.md
index 992488f0..42f3e122 100644
--- a/content/rooms/v12.md
+++ b/content/rooms/v12.md
@@ -131,8 +131,7 @@ The rules are as follows:
         1.  If the event is not validly signed by the homeserver of the user ID denoted
             by the key, reject.
     3.  If `membership` is `join`:
-        1.  {{% changed-in v=11 %}}
-            If the only previous event is an `m.room.create` and the
+        1.  If the only previous event is an `m.room.create` and the
             `state_key` is the sender of the `m.room.create`, allow.
         2.  If the `sender` does not match `state_key`, reject.
         3.  If the `sender` is banned, reject.