diff --git a/proposals/xxxx-identity-server-account-data.md b/proposals/2230-identity-server-account-data.md
similarity index 98%
rename from proposals/xxxx-identity-server-account-data.md
rename to proposals/2230-identity-server-account-data.md
index da539f2a2..b863cc593 100644
--- a/proposals/xxxx-identity-server-account-data.md
+++ b/proposals/2230-identity-server-account-data.md
@@ -1,4 +1,4 @@
-# Store Identity Server in Account Data
+# MSC2230: Store Identity Server in Account Data
 
 The URL of the Identity Sever to use is currently specified at registration and
 login time and then used for the lifetime of a login session. If users wish to