diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 659a5940a5b2..94c8809e8170 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -9876,6 +9876,7 @@ static int btrfs_swap_activate(struct swap_info_struct *sis, struct file *file,
 	if (btrfs_root_dead(root)) {
 		spin_unlock(&root->root_item_lock);
 
+		btrfs_drew_write_unlock(&root->snapshot_lock);
 		btrfs_exclop_finish(fs_info);
 		btrfs_warn(fs_info,
 		"cannot activate swapfile because subvolume %llu is being deleted",