diff --git a/src/DefaultRenderer.js b/src/DefaultRenderer.js
index 06a01fe94..686d2fb4b 100644
--- a/src/DefaultRenderer.js
+++ b/src/DefaultRenderer.js
@@ -64,6 +64,14 @@ export default class DefaultRenderer extends Component {
       return;
     }
     const scene = navigationState.children[navigationState.index];
+    // (temp or production?) Fix for #664
+    if (navigationState.index > 0) {
+      // Make sure the key names are not the same, or error will be thrown.
+      if (scene.key === navigationState.children[navigationState.index-1].key) {
+        // Change the new key name (just add current index to end of scene.key)
+        scene.key = scene.key+=navigationState.index;
+      }
+    }
     Actions.focus({ scene });
   }