--- aufs/fs/aufs25/vfsub.h.orig	2009-03-16 00:09:09.000000000 +0100
+++ aufs/fs/aufs25/vfsub.h	2009-03-16 00:09:22.000000000 +0100
@@ -207,7 +207,7 @@
 }
 #endif
 
-#ifndef CONFIG_AUFS_BR_XFS
+#ifdef CONFIG_AUFS_BR_XFS
 /* br_xfs.c */
 dev_t au_h_rdev(struct inode *h_inode, struct vfsmount *h_mnt,
 		struct dentry *h_dentry);