diff --git a/index.js b/index.js
index 9237ba7..158b884 100644
--- a/index.js
+++ b/index.js
@@ -7,7 +7,7 @@ var normalizeOpts = require('es5-ext/object/normalize-options')
 module.exports = function (fn/*, options*/) {
 	var options = normalizeOpts(arguments[1]), length;
 
-	if (!options.normalizer && !options.serialize) {
+	if (!options.normalizer) {
 		length = options.length = resolveLength(options.length, fn.length, options.async);
 		if (length === 0) {
 			options.normalizer = require('./lib/normalizers/0');
diff --git a/lib/configure-map.js b/lib/configure-map.js
index c7b2949..930c504 100644
--- a/lib/configure-map.js
+++ b/lib/configure-map.js
@@ -27,18 +27,18 @@ module.exports = function (original, length, options) {
 	else memLength = original.length;
 
 	if (options.normalizer) {
-		get = callable(options.normalizer.get);
-		if (options.normalizer.set !== undefined) {
-			set = callable(options.normalizer.set);
-			del = callable(options.normalizer.delete);
-			clear = callable(options.normalizer.clear);
+		if (typeof options.normalizer === 'function') {
+			set = get = options.normalizer;
 		} else {
-			set = get;
+			get = callable(options.normalizer.get);
+			if (options.normalizer.set !== undefined) {
+				set = callable(options.normalizer.set);
+				del = callable(options.normalizer.delete);
+				clear = callable(options.normalizer.clear);
+			} else {
+				set = get;
+			}
 		}
-	} else if (options.serialize) {
-		set = get = (function (serialize) {
-			return function (args) { return serialize.apply(null, args); };
-		}(callable(options.serialize)));
 	}
 
 	if (options.resolvers != null) {
diff --git a/test/index.js b/test/index.js
index f8794ce..a78997d 100644
--- a/test/index.js
+++ b/test/index.js
@@ -90,9 +90,9 @@ module.exports = function (t, a) {
 				}
 			};
 		},
-		"Serialize": function () {
+		"Normalizer function": function () {
 			var i = 0, fn = function () { ++i; return join.call(arguments, '|'); }, mfn;
-			mfn = t(fn, { serialize: Boolean });
+			mfn = t(fn, { normalizer: function (args) { return Boolean(args[0]); } });
 			a(mfn(false, 'raz'), 'false|raz', "#1");
 			a(mfn(0, 'dwa'), 'false|raz', "#2");
 			a(i, 1, "Called once");