diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 95c499b8424e..388259204aae 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4199,8 +4199,9 @@ static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir)
 	 * 1 for the dir index
 	 * 1 for the inode ref
 	 * 1 for the inode
+	 * 1 for the parent inode
 	 */
-	return btrfs_start_transaction_fallback_global_rsv(root, 5);
+	return btrfs_start_transaction_fallback_global_rsv(root, 6);
 }
 
 static int btrfs_unlink(struct inode *dir, struct dentry *dentry)