diff --git a/lib/weak.js b/lib/weak.js
index 115a4fe..c6a5447 100644
--- a/lib/weak.js
+++ b/lib/weak.js
@@ -32,9 +32,8 @@ module.exports = function (memoize) {
 		if (options.resolvers) resolve = resolveResolve(options.resolvers);
 		if (options.normalizer) normalizer = resolveNormalize(options.normalizer);
 
-		if ((length === 1) && !normalizer && !(options.async && extensions.async) &&
-				!(options.dispose && extensions.dispose) && !(options.maxAge && extensions.maxAge) &&
-				!(options.max && extensions.max) && !(options.refCounter && extensions.refCounter)) {
+		if ((length === 1) && !normalizer && !options.async && !options.dispose && !options.maxAge &&
+				!options.max && !options.refCounter) {
 			return defineProperties(function (obj) {
 				var result, args = arguments;
 				if (resolve) args = resolve(args);
@@ -85,7 +84,7 @@ module.exports = function (memoize) {
 				memoizer.delete.apply(this, slice.call(args, 1));
 			}, length))
 		});
-		if (!options.refCounter || !extensions.refCounter) return memoized;
+		if (!options.refCounter) return memoized;
 		defineProperties(memoized, {
 			deleteRef: d(defineLength(function (obj) {
 				var memoizer, args = arguments;
diff --git a/test/weak.js b/test/weak.js
index b76b797..4ab24c3 100644
--- a/test/weak.js
+++ b/test/weak.js
@@ -1,6 +1,6 @@
 'use strict';
 
-module.exports = function (t, a) {
+module.exports = function (t, a, d) {
 	var value = [], obj = {}, memoized, count = 0, x, y, z;
 	memoized = t(function (arg, x, y) { a(arg, obj); return x + y; },
 		{ refCounter: true, dispose: function (val) { value.push(val); } });
@@ -30,4 +30,14 @@ module.exports = function (t, a) {
 	a(memoized(x), 1);
 	a(memoized(z), 3);
 	a(count, 3);
+
+	count = 0;
+	memoized = t(function (arg) { return ++count; }, { maxAge: 1 });
+
+	memoized(obj);
+	setTimeout(function () {
+		memoized(obj);
+		a(count, 2);
+		d();
+	}, 100);
 };