diff --git a/test/zone.spec.js b/test/zone.spec.js
index c4b8d9c21..449b8e937 100644
--- a/test/zone.spec.js
+++ b/test/zone.spec.js
@@ -441,6 +441,14 @@ describe('Zone.patch', function () {
         expect(hasParent).toBe(true);
       });
     });
+
+    it('should preserve other setters', function () {
+      var req = new XMLHttpRequest();
+      req.open('get', '/', true);
+      req.send();
+      req.responseType = 'document';
+      expect(req.responseType).toBe('document');
+    });
   });
 
 
diff --git a/zone.js b/zone.js
index 59864f2b8..62ba7c0ff 100644
--- a/zone.js
+++ b/zone.js
@@ -346,6 +346,8 @@ Zone.patchClass = function (className) {
           set: function (fn) {
             if (typeof fn === 'function') {
               this._o[prop] = zone.bind(fn);
+            } else {
+              this._o[prop] = fn;
             }
           },
           get: function () {