diff --git a/pkg/local_object_storage/engine/tree.go b/pkg/local_object_storage/engine/tree.go
index 268b4adfa..df8eb1706 100644
--- a/pkg/local_object_storage/engine/tree.go
+++ b/pkg/local_object_storage/engine/tree.go
@@ -238,7 +238,7 @@ func (e *StorageEngine) TreeGetChildren(ctx context.Context, cid cidSDK.ID, tree
 }
 
 // TreeSortedByFilename implements the pilorama.Forest interface.
-func (e *StorageEngine) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, treeID string, nodeID pilorama.MultiNode, last *string, count int) ([]pilorama.MultiNodeInfo, *string, error) {
+func (e *StorageEngine) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, treeID string, nodeID pilorama.MultiNode, lastFilename *string, count int) ([]pilorama.MultiNodeInfo, *string, error) {
 	ctx, span := tracing.StartSpanFromContext(ctx, "StorageEngine.TreeSortedByFilename",
 		trace.WithAttributes(
 			attribute.String("container_id", cid.EncodeToString()),
@@ -251,7 +251,7 @@ func (e *StorageEngine) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID,
 	var nodes []pilorama.MultiNodeInfo
 	var cursor *string
 	for _, sh := range e.sortShards(cid) {
-		nodes, cursor, err = sh.TreeSortedByFilename(ctx, cid, treeID, nodeID, last, count)
+		nodes, cursor, err = sh.TreeSortedByFilename(ctx, cid, treeID, nodeID, lastFilename, count)
 		if err != nil {
 			if err == shard.ErrPiloramaDisabled {
 				break
@@ -266,7 +266,7 @@ func (e *StorageEngine) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID,
 		}
 		return nodes, cursor, nil
 	}
-	return nil, last, err
+	return nil, lastFilename, err
 }
 
 // TreeGetOpLog implements the pilorama.Forest interface.
diff --git a/pkg/local_object_storage/pilorama/boltdb.go b/pkg/local_object_storage/pilorama/boltdb.go
index 86b19e3af..a4fa74e35 100644
--- a/pkg/local_object_storage/pilorama/boltdb.go
+++ b/pkg/local_object_storage/pilorama/boltdb.go
@@ -1083,7 +1083,7 @@ func (t *boltForest) hasFewChildren(b *bbolt.Bucket, nodeIDs MultiNode, threshol
 }
 
 // TreeSortedByFilename implements the Forest interface.
-func (t *boltForest) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, treeID string, nodeIDs MultiNode, last *string, count int) ([]MultiNodeInfo, *string, error) {
+func (t *boltForest) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, treeID string, nodeIDs MultiNode, lastFilename *string, count int) ([]MultiNodeInfo, *string, error) {
 	var (
 		startedAt = time.Now()
 		success   = false
@@ -1104,13 +1104,13 @@ func (t *boltForest) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, tr
 	defer t.modeMtx.RUnlock()
 
 	if t.mode.NoMetabase() {
-		return nil, last, ErrDegradedMode
+		return nil, lastFilename, ErrDegradedMode
 	}
 	if len(nodeIDs) == 0 {
-		return nil, last, errors.New("empty node list")
+		return nil, lastFilename, errors.New("empty node list")
 	}
 
-	h := newHeap(last, count)
+	h := newHeap(lastFilename, count)
 	key := make([]byte, 9)
 
 	var result []NodeInfo
@@ -1149,11 +1149,11 @@ func (t *boltForest) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, tr
 
 	success = err == nil
 	if err != nil {
-		return nil, last, metaerr.Wrap(err)
+		return nil, lastFilename, metaerr.Wrap(err)
 	}
 
 	if fewChildren {
-		result = sortAndCut(result, last)
+		result = sortAndCut(result, lastFilename)
 	}
 	res := mergeNodeInfos(result)
 	if len(res) > count {
@@ -1161,9 +1161,9 @@ func (t *boltForest) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, tr
 	}
 	if len(res) != 0 {
 		s := string(findAttr(res[len(res)-1].Meta, AttributeFilename))
-		last = &s
+		lastFilename = &s
 	}
-	return res, last, metaerr.Wrap(err)
+	return res, lastFilename, metaerr.Wrap(err)
 }
 
 func sortByFilename(nodes []NodeInfo) {
diff --git a/pkg/local_object_storage/pilorama/interface.go b/pkg/local_object_storage/pilorama/interface.go
index 1f7e742a2..5a59eb847 100644
--- a/pkg/local_object_storage/pilorama/interface.go
+++ b/pkg/local_object_storage/pilorama/interface.go
@@ -37,7 +37,7 @@ type Forest interface {
 	TreeGetChildren(ctx context.Context, cid cidSDK.ID, treeID string, nodeID Node) ([]NodeInfo, error)
 	// TreeSortedByFilename returns children of the node with the specified ID. The nodes are sorted by the filename attribute..
 	// Should return ErrTreeNotFound if the tree is not found, and empty result if the node is not in the tree.
-	TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, treeID string, nodeID MultiNode, last *string, count int) ([]MultiNodeInfo, *string, error)
+	TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, treeID string, nodeID MultiNode, lastFilename *string, count int) ([]MultiNodeInfo, *string, error)
 	// TreeGetOpLog returns first log operation stored at or above the height.
 	// In case no such operation is found, empty Move and nil error should be returned.
 	TreeGetOpLog(ctx context.Context, cid cidSDK.ID, treeID string, height uint64) (Move, error)
diff --git a/pkg/local_object_storage/shard/tree.go b/pkg/local_object_storage/shard/tree.go
index 01a014cec..59448aa6a 100644
--- a/pkg/local_object_storage/shard/tree.go
+++ b/pkg/local_object_storage/shard/tree.go
@@ -211,7 +211,7 @@ func (s *Shard) TreeGetChildren(ctx context.Context, cid cidSDK.ID, treeID strin
 }
 
 // TreeSortedByFilename implements the pilorama.Forest interface.
-func (s *Shard) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, treeID string, nodeID pilorama.MultiNode, last *string, count int) ([]pilorama.MultiNodeInfo, *string, error) {
+func (s *Shard) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, treeID string, nodeID pilorama.MultiNode, lastFilename *string, count int) ([]pilorama.MultiNodeInfo, *string, error) {
 	ctx, span := tracing.StartSpanFromContext(ctx, "Shard.TreeSortedByFilename",
 		trace.WithAttributes(
 			attribute.String("shard_id", s.ID().String()),
@@ -222,16 +222,16 @@ func (s *Shard) TreeSortedByFilename(ctx context.Context, cid cidSDK.ID, treeID
 	defer span.End()
 
 	if s.pilorama == nil {
-		return nil, last, ErrPiloramaDisabled
+		return nil, lastFilename, ErrPiloramaDisabled
 	}
 
 	s.m.RLock()
 	defer s.m.RUnlock()
 
 	if s.info.Mode.NoMetabase() {
-		return nil, last, ErrDegradedMode
+		return nil, lastFilename, ErrDegradedMode
 	}
-	return s.pilorama.TreeSortedByFilename(ctx, cid, treeID, nodeID, last, count)
+	return s.pilorama.TreeSortedByFilename(ctx, cid, treeID, nodeID, lastFilename, count)
 }
 
 // TreeGetOpLog implements the pilorama.Forest interface.