diff --git a/src/add-ons/kernel/file_systems/bfs/BPlusTree.cpp b/src/add-ons/kernel/file_systems/bfs/BPlusTree.cpp
index f1569c2c79..419839feda 100644
--- a/src/add-ons/kernel/file_systems/bfs/BPlusTree.cpp
+++ b/src/add-ons/kernel/file_systems/bfs/BPlusTree.cpp
@@ -853,6 +853,7 @@ BPlusTree::MakeEmpty()
 {
 	// Put all nodes into the free list in order
 	Transaction transaction(fStream->GetVolume(), fStream->BlockNumber());
+	fStream->WriteLockInTransaction(transaction);
 
 	// Reset the header, and root node
 	CachedNode cached(this);