diff --git a/Promise.js b/Promise.js
index 9990f7b..321ee8b 100644
--- a/Promise.js
+++ b/Promise.js
@@ -845,6 +845,7 @@ object.Constructor('IterablePromise', Promise, {
 // 		Q: what IterablePromise does/should do if a promise resolves to 
 // 			a promise multiple times...
 // XXX not sure if this is a viable strategy....
+// XXX use IterableSequentialPromise in .__packed....
 var IterableSequentialPromise =
 module.IterableSequentialPromise =
 object.Constructor('IterableSequentialPromise', IterablePromise, {