diff --git a/libbb/libbbd.c b/libbb/libbbd.c
index a2cd5af..924002c 100644
--- a/libbb/libbbd.c
+++ b/libbb/libbbd.c
@@ -1,8 +1,8 @@
 /*
  * libbb/libbbd.c - Bitbang library daemon
  *
- * Written 2010 by Werner Almesberger
- * Copyright 2010 Werner Almesberger
+ * Written 2010-2011 by Werner Almesberger
+ * Copyright 2010-2011 Werner Almesberger
  *
  * 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
@@ -156,7 +156,7 @@ fprintf(stderr, "closefds\n");
 	closefds();
 
 fprintf(stderr, "open devmem\n");
-	fd = open("/dev/mem", O_RDWR);
+	fd = open("/dev/mem", O_RDWR | O_SYNC);
 	if (fd < 0) {
 		perror("/dev/mem");
 		exit(1);