diff --git a/fs/btrfs/space-info.c b/fs/btrfs/space-info.c
index b03c015d5d51..a2af55178c69 100644
--- a/fs/btrfs/space-info.c
+++ b/fs/btrfs/space-info.c
@@ -1047,6 +1047,8 @@ static bool steal_from_global_rsv(struct btrfs_space_info *space_info,
 	struct btrfs_block_rsv *global_rsv = &fs_info->global_block_rsv;
 	u64 min_bytes;
 
+	lockdep_assert_held(&space_info->lock);
+
 	if (!ticket->steal)
 		return false;