diff --git a/source/Ox/js/Fallback.js b/source/Ox/js/Fallback.js
index ba135f0c..9002cc59 100644
--- a/source/Ox/js/Fallback.js
+++ b/source/Ox/js/Fallback.js
@@ -185,8 +185,8 @@ Ox.fallback.JSON = (function() {
                 ret = isFinite(value) ? String(value) : 'null';
             } else if (type == 'object') {
                 ret = ['{', '}'].join(
-                    value.map(function(v, k) {
-                        return quote(k) + ': ' + stringify(v);
+                    Object.keys(value).map(function(k) {
+                        return quote(k) + ': ' + stringify(value[k]);
                     }).join(',')
                 );
             } else if (type == 'string') {