diff --git a/packages/ember-data/lib/system/model/internal-model.js b/packages/ember-data/lib/system/model/internal-model.js
index 0aa500334fe..28d509d7eb6 100644
--- a/packages/ember-data/lib/system/model/internal-model.js
+++ b/packages/ember-data/lib/system/model/internal-model.js
@@ -59,6 +59,7 @@ export default function InternalModel(type, id, store, container, data) {
   this._attributes = new EmptyObject();
   this._inFlightAttributes = new EmptyObject();
   this._relationships = new Relationships(this);
+  this._recordArrays = undefined;
   this.currentState = RootState.empty;
   this.isReloading = false;
   this.isError = false;
diff --git a/packages/ember-data/lib/system/model/model.js b/packages/ember-data/lib/system/model/model.js
index af0f62f0d7f..11896f079e8 100644
--- a/packages/ember-data/lib/system/model/model.js
+++ b/packages/ember-data/lib/system/model/model.js
@@ -43,10 +43,7 @@ var retrieveFromCurrentState = Ember.computed('currentState', function(key) {
   @uses Ember.Evented
 */
 var Model = Ember.Object.extend(Ember.Evented, {
-  _recordArrays: undefined,
-  _relationships: undefined,
   _internalModel: null,
-
   store: null,
 
   /**