diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 388ac39..d3f2fe0 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -253,7 +253,7 @@
 	end_of_last_block = start_pos + num_bytes - 1;
 
 	lock_extent(io_tree, start_pos, end_of_last_block, GFP_NOFS);
-	trans = btrfs_start_transaction(root, 1);
+	trans = btrfs_join_transaction(root, 1);
 	if (!trans) {
 		err = -ENOMEM;
 		goto out_unlock;