diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 4b81ea3..81c772b 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1034,6 +1034,7 @@
 	struct btrfs_space_info *space_info;
 	spinlock_t lock;
 	unsigned int full;
+	unsigned int failfast;
 };
 
 /*