1 files changed, 10 insertions, 1 deletions

diff --git a/node_modules/montage/core/promise.js b/node_modules/montage/core/promise.js
index aabe113d..df063846 100755
--- a/node_modules/montage/core/promise.js
+++ b/node_modules/montage/core/promise.js
@@ -65,8 +65,17 @@ function toPromise(value) {
 var Creatable = Object.create(Object.prototype, {
     create: {
         value: function (descriptor) {
+            for (var name in descriptor) {
+                var property = descriptor[name];
+                if (!property.set && !property.get) {
+                    property.writable = true
+                }
+                property.configurable = true;
+            }
             return Object.create(this, descriptor);
-        }
+        },
+        writable: true,
+        configurable: true
     },
 });