diff --git a/core/src/main/java/com/orientechnologies/orient/core/db/record/ridbag/sbtree/OIndexRIDContainer.java b/core/src/main/java/com/orientechnologies/orient/core/db/record/ridbag/sbtree/OIndexRIDContainer.java
index 9ecd7280a43..77ff7d3c0b7 100755
--- a/core/src/main/java/com/orientechnologies/orient/core/db/record/ridbag/sbtree/OIndexRIDContainer.java
+++ b/core/src/main/java/com/orientechnologies/orient/core/db/record/ridbag/sbtree/OIndexRIDContainer.java
@@ -232,7 +232,7 @@ public void checkNotEmbedded() {
   private void convertToSbTree() {
     final ODatabaseDocumentInternal db = ODatabaseRecordThreadLocal.INSTANCE.get();
     final OIndexRIDContainerSBTree tree = new OIndexRIDContainerSBTree(fileId, durableNonTxMode,
-        (OAbstractPaginatedStorage) db.getStorage());
+        (OAbstractPaginatedStorage) db.getStorage().getUnderlying());
 
     tree.addAll(underlying);