diff --git a/proposals/xxxx-olm-fallback-keys.md b/proposals/2732-olm-fallback-keys.md
similarity index 98%
rename from proposals/xxxx-olm-fallback-keys.md
rename to proposals/2732-olm-fallback-keys.md
index 75322bee1..d24ef3800 100644
--- a/proposals/xxxx-olm-fallback-keys.md
+++ b/proposals/2732-olm-fallback-keys.md
@@ -1,4 +1,4 @@
-# MSCxxxx: Olm fallback keys
+# MSC2732: Olm fallback keys
 
 Olm uses a set of one-time keys when initializing a session between two
 devices: Alice uploads one-time keys to her homeserver, and Bob claims one of