diff --git a/memo/program/src/lib.rs b/memo/program/src/lib.rs
index 4f3b5d29..c4665f36 100644
--- a/memo/program/src/lib.rs
+++ b/memo/program/src/lib.rs
@@ -13,6 +13,11 @@ use solana_program::{
     pubkey::Pubkey,
 };
 
+/// Legacy symbols from Memo v1
+pub mod v1 {
+    solana_program::declare_id!("Memo1UhkJRfHyvLMcVucJwxXeuD728EqVDDwQDxFMNo");
+}
+
 solana_program::declare_id!("MemoSq4gqABAXKb96qnH8TysNcWxMyWCqXgDLGmfcHr");
 
 /// Build a memo instruction, possibly signed