diff --git a/swap/src/alice.rs b/swap/src/alice.rs
index aebd9b3f..4fae9003 100644
--- a/swap/src/alice.rs
+++ b/swap/src/alice.rs
@@ -132,6 +132,7 @@ impl Default for Alice {
     }
 }
 
+// TODO: Check that this is correct.
 fn calculate_amounts(btc: bitcoin::Amount) -> SwapParams {
     const XMR_PER_BTC: u64 = 100; // TODO: Get this from an exchange.