diff --git a/ampersand-state.js b/ampersand-state.js
index 86ce52e..4f6ec48 100644
--- a/ampersand-state.js
+++ b/ampersand-state.js
@@ -25,6 +25,7 @@ var BBEvents = require('backbone-events-standalone');
 var KeyTree = require('key-tree-store');
 var arrayNext = require('array-next');
 var changeRE = /^change:/;
+var isObjectEqual = require('amp-is-object-equal');
 
 function Base(attrs, options) {
     options || (options = {});
@@ -410,9 +411,11 @@ assign(Base.prototype, BBEvents, {
             var update = function (options) {
                 options = options || {};
 
+
+
                 var newVal = def.fn.call(self);
 
-                if (self._cache[name] !== newVal || !def.cache) {
+                if (!isObjectEqual(self._cache[name], newVal) || !def.cache) {
                     if (def.cache) {
                         self._previousAttributes[name] = self._cache[name];
                     }
diff --git a/package.json b/package.json
index 76feb90..52dd355 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
   },
   "dependencies": {
     "ampersand-version": "^1.0.0",
+    "amp-is-object-equal": "^1.0.2",
     "array-next": "~0.0.1",
     "backbone-events-standalone": "0.2.2",
     "key-tree-store": "~0.1.0",