diff --git a/packages/ember-application/lib/system/resolver.js b/packages/ember-application/lib/system/resolver.js
index 689d0afd1d8..979f4fbecdd 100644
--- a/packages/ember-application/lib/system/resolver.js
+++ b/packages/ember-application/lib/system/resolver.js
@@ -298,12 +298,12 @@ export default EmberObject.extend({
   resolveTemplate(parsedName) {
     var templateName = parsedName.fullNameWithoutType.replace(/\./g, '/');
 
-    if (Ember.TEMPLATES[templateName]) {
+    if (Ember.TEMPLATES.hasOwnProperty(templateName)) {
       return Ember.TEMPLATES[templateName];
     }
 
     templateName = decamelize(templateName);
-    if (Ember.TEMPLATES[templateName]) {
+    if (Ember.TEMPLATES.hasOwnProperty(templateName)) {
       return Ember.TEMPLATES[templateName];
     }
   },
diff --git a/packages/ember-routing/lib/system/router.js b/packages/ember-routing/lib/system/router.js
index 52740d494f4..0d23bc58197 100644
--- a/packages/ember-routing/lib/system/router.js
+++ b/packages/ember-routing/lib/system/router.js
@@ -102,7 +102,7 @@ var EmberRouter = EmberObject.extend(Evented, {
 
   init() {
     this._activeViews = {};
-    this._qpCache = {};
+    this._qpCache = Object.create(null);
     this._resetQueuedQueryParameterChanges();
   },
 
diff --git a/packages/ember/tests/routing/query_params_test.js b/packages/ember/tests/routing/query_params_test.js
index 49a1a481d2e..28d274989ef 100644
--- a/packages/ember/tests/routing/query_params_test.js
+++ b/packages/ember/tests/routing/query_params_test.js
@@ -3079,3 +3079,28 @@ QUnit.test('warn user that routes query params configuration must be an Object,
     bootApplication();
   }, 'You passed in `[{"commitBy":{"replace":true}}]` as the value for `queryParams` but `queryParams` cannot be an Array');
 });
+
+QUnit.test('handle routes names that class with Object.prototype properties', function() {
+  expect(1);
+
+  Router.map(function() {
+    this.route('constructor');
+  });
+
+  App.ConstructorRoute = Ember.Route.extend({
+    queryParams: {
+      foo: {
+        defaultValue: '123'
+      }
+    }
+  });
+
+  bootApplication();
+
+  Ember.run(router, 'transitionTo', 'constructor', { queryParams: { foo: '999' } });
+
+  var controller = container.lookup('controller:constructor');
+  equal(get(controller, 'foo'), '999');
+});
+
+