diff --git a/archival/libunarchive/data_align.c b/archival/libunarchive/data_align.c
index e4a3640..1efe9d8 100644
--- a/archival/libunarchive/data_align.c
+++ b/archival/libunarchive/data_align.c
@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
 /*
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by