diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h
index 10e9d96..6490d2a 100644
--- a/fs/xfs/xfs_error.h
+++ b/fs/xfs/xfs_error.h
@@ -174,6 +174,8 @@
 /* PRINTFLIKE3 */
 extern void xfs_fs_cmn_err(int level, struct xfs_mount *mp, char *fmt, ...);
 
+extern void xfs_hex_dump(void *p, int length);
+
 #define xfs_fs_repair_cmn_err(level, mp, fmt, args...) \
 	xfs_fs_cmn_err(level, mp, fmt "  Unmount and run xfs_repair.", ## args)