diff --git a/argv.js b/argv.js
index 1496b78..a5c7d0a 100644
--- a/argv.js
+++ b/argv.js
@@ -462,6 +462,8 @@ object.Constructor('Parser', {
 
 
 	// post parsing callbacks...
+	// XXX add defaults...
+	// XXX add ability to clear defaults...
 	then: afterCallback('parsing'),
 	stop: afterCallback('stop'),
 	error: afterCallback('error'),