diff --git a/src/scene/SceneManager.js b/src/scene/SceneManager.js
index 42a9b24de..43dbaf2de 100644
--- a/src/scene/SceneManager.js
+++ b/src/scene/SceneManager.js
@@ -577,7 +577,7 @@ var SceneManager = new Class({
                 sys.step(time, delta);
             }
 
-            if (sys.scenePlugin._target)
+            if (sys.scenePlugin && sys.scenePlugin._target)
             {
                 sys.scenePlugin.step(time, delta);
             }