diff --git a/rs/nns/cmc/src/main.rs b/rs/nns/cmc/src/main.rs
index b6d7fe32e32..57cb87c5f7b 100644
--- a/rs/nns/cmc/src/main.rs
+++ b/rs/nns/cmc/src/main.rs
@@ -1885,8 +1885,9 @@ async fn issue_automatic_refund_if_memo_not_offerred(
                 })
             }
 
-            // There is no (known) way to reach this case, since we already
-            // verified that memo is in MEANINGFUL_MEMOS.
+            // There is no (known) way to reach this case, since a check
+            // earlier in this function ensures by this point, memo is not one
+            // of the special meaningful values.
             NotifiedCreateCanister(_) | NotifiedMint(_) | NotifiedTopUp(_) => {
                 Err(NotifyError::InvalidTransaction(format!(
                     "Block has already been processed: {:?}",