diff --git a/src/com/android/gallery3d/app/ActivityState.java b/src/com/android/gallery3d/app/ActivityState.java
index 1ef93a4..1563a09 100644
--- a/src/com/android/gallery3d/app/ActivityState.java
+++ b/src/com/android/gallery3d/app/ActivityState.java
@@ -127,7 +127,9 @@
     }
 
     protected void onPause() {
-        ((Activity) mActivity).unregisterReceiver(mPowerIntentReceiver);
+        if (0 != (mFlags & FLAG_SCREEN_ON)) {
+            ((Activity) mActivity).unregisterReceiver(mPowerIntentReceiver);
+        }
     }
 
     // should only be called by StateManager