diff --git a/lib/trader.js b/lib/trader.js
index e6b0405c..4be3b5fd 100644
--- a/lib/trader.js
+++ b/lib/trader.js
@@ -83,7 +83,7 @@ Trader.prototype._purchase = function (trade) {
   var self = this;
   var rate = self.rate(trade.currency);
   self.tradeExchange.purchase(trade.satoshis, rate.rate, function (err) {
-    // XXX: don't ignore purchase errors
+    // TODO: don't ignore purchase errors
     self.pollBalance();
   });
 };