diff --git a/bitmap.c b/bitmap.c
index 378623f..2da2c52 100644
--- a/bitmap.c
+++ b/bitmap.c
@@ -1,4 +1,4 @@
-/*
+/* -*- c-basic-offset: 8 -*-
    rdesktop: A Remote Desktop Protocol client.
    Bitmap decompression routines
    Copyright (C) Matthew Chapman 1999-2002