diff --git a/fs/btrfs/sysfs.h b/fs/btrfs/sysfs.h
index 4edf2a7839ad39f235878268a1ee10ac9ffbb0be..915307ff1a76412a60613b2a70051af07ce3bb78 100644
--- a/fs/btrfs/sysfs.h
+++ b/fs/btrfs/sysfs.h
@@ -88,4 +88,5 @@ int btrfs_kobj_rm_device(struct btrfs_fs_devices *fs_devices,
                 struct btrfs_device *one_device);
 int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
 				struct kobject *parent);
+int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
 #endif /* _BTRFS_SYSFS_H_ */