diff --git a/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTree.java b/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTree.java
index 6b5f07a..4a3f7bf 100644
--- a/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTree.java
+++ b/hyracks-storage-am-lsm-btree/src/main/java/edu/uci/ics/hyracks/storage/am/lsm/btree/impls/LSMBTree.java
@@ -407,9 +407,8 @@
     public void cleanUpAfterMerge(List<Object> mergedComponents) throws HyracksDataException {
         for (Object o : mergedComponents) {
             BTree oldBTree = (BTree) o;
-            FileReference fileRef = diskFileMapProvider.lookupFileName(oldBTree.getFileId());
             oldBTree.deactivate();
-            fileRef.getFile().delete();
+            oldBTree.destroy();
         }
     }