1 files changed, 6 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/data/ComboAlbumSet.java b/src/com/android/gallery3d/data/ComboAlbumSet.java
index aa196039d..16adc12f4 100644
--- a/src/com/android/gallery3d/data/ComboAlbumSet.java
+++ b/src/com/android/gallery3d/data/ComboAlbumSet.java
@@ -18,6 +18,7 @@ package com.android.gallery3d.data;
 
 import com.android.gallery3d.R;
 import com.android.gallery3d.app.GalleryApp;
+import com.android.gallery3d.util.Future;
 
 // ComboAlbumSet combines multiple media sets into one. It lists all sub
 // media sets from the input album sets.
@@ -77,4 +78,9 @@ public class ComboAlbumSet extends MediaSet implements ContentListener {
     public void onContentDirty() {
         notifyContentChanged();
     }
+
+    @Override
+    public Future<Integer> requestSync(SyncListener listener) {
+        return requestSyncOnEmptySets(mSets, listener);
+    }
 }