diff -ur a/src/gpart.c b/src/gpart.c
--- a/src/gpart.c	2009-11-30 10:39:30.000000000 +0800
+++ b/src/gpart.c	2009-11-30 10:41:09.000000000 +0800
@@ -1221,7 +1221,7 @@
 {
 	int		fd, ret = 0;
 
-	if ((fd = open(bfile,O_WRONLY|O_CREAT)) < 0)
+	if ((fd = open(bfile,O_WRONLY|O_CREAT, 0644)) < 0)
 		return (ret);
 
 	if (write(fd,d->d_pt.t_boot,512) == 512)