--- a/btrfsck.c.new	2011-10-04 02:05:51.891833030 +0200
+++ b/btrfsck.c	2011-10-04 02:07:51.999653799 +0200
@@ -2816,10 +2816,11 @@ int main(int ac, char **av)
 
 	while(1) {
 		int c;
-		c = getopt(ac, av, "s:");
+		c = getopt(ac, av, "as:");
 		if (c < 0)
 			break;
 		switch(c) {
+			case 'a': /* ignored */ break;
 			case 's':
 				num = atol(optarg);
 				bytenr = btrfs_sb_offset(num);