diff --git a/docs/encyclopedia/pooled-accounts-muxed-accounts-memos.mdx b/docs/encyclopedia/pooled-accounts-muxed-accounts-memos.mdx
index 0cf6d98cc..2752b4b56 100644
--- a/docs/encyclopedia/pooled-accounts-muxed-accounts-memos.mdx
+++ b/docs/encyclopedia/pooled-accounts-muxed-accounts-memos.mdx
@@ -22,7 +22,7 @@ Muxed accounts are embedded into the protocol for convenience and standardizatio
 
 Muxed accounts do not exist on the ledger, but their shared underlying `GABC…` account does.
 
-Muxed accounts are defined in [CAP-0027](https://stellar.org/protocol/cap-27), introduced in Protocol 13, and their string representation is described in [SEP-0021](https://stellar.org/protocol/sep-21).
+Muxed accounts are defined in [CAP-0027](https://stellar.org/protocol/cap-27), introduced in Protocol 13, and their string representation is described in [SEP-0023](https://stellar.org/protocol/sep-23).
 
 It is safe for all wallets to implement sending to muxed accounts.