diff --git a/lib/ext/async.js b/lib/ext/async.js
index 1d34b31..9403fc1 100644
--- a/lib/ext/async.js
+++ b/lib/ext/async.js
@@ -10,7 +10,7 @@ var toArray    = require('es5-ext/lib/Array/from')
   , apply = Function.prototype.apply;
 
 require('../_base').ext.async = function (ignore, conf, options) {
-	var cache;
+	var cache, purge;
 
 	cache = conf.async = {};
 
@@ -97,16 +97,17 @@ require('../_base').ext.async = function (ignore, conf, options) {
 
 	}(conf.fn));
 
-	conf.on('purge', function (id) {
+	conf.on('purge', purge = function (id) {
 		// If false, we don't have value yet, so we assume that intention is not
 		// to memoize this call. After value is obtained we don't cache it but
 		// gracefully pass to callback
 		if (!isArray(cache[id])) {
+			conf.emit('purgeasync', id);
 			delete cache[id];
 		}
 	});
 
 	conf.on('purgeall', function () {
-		cache = conf.async = {};
+		forEach(conf.async, function (value, id) { purge(id); });
 	});
 };