diff --git a/src/ch/zhaw/ads/Storage.java b/src/ch/zhaw/ads/Storage.java
index 4e1fd17..30b71f0 100644
--- a/src/ch/zhaw/ads/Storage.java
+++ b/src/ch/zhaw/ads/Storage.java
@@ -129,8 +129,8 @@ public class Storage {
     private static void sweep(List<Collectable> heap) {
         heap.removeIf(obj -> !obj.isMarked());
         heap.forEach(obj -> obj.setMark(false));
-        //oldHeap.addAll(youngHeap);
-        //youngHeap.clear();
+        oldHeap.addAll(youngHeap);
+        youngHeap.clear();
     }
 
     public static void gc() {