diff -Nru diskdev_cmds-332.14.orig//fsck_hfs.tproj/fsck_hfs.c diskdev_cmds-332.14/fsck_hfs.tproj/fsck_hfs.c
--- diskdev_cmds-332.14.orig//fsck_hfs.tproj/fsck_hfs.c	2011-04-07 20:08:14.141449714 +0200
+++ diskdev_cmds-332.14/fsck_hfs.tproj/fsck_hfs.c	2011-04-07 20:14:46.938645360 +0200
@@ -109,7 +109,7 @@
 	else
 		progname = *argv;
 
-	while ((ch = getopt(argc, argv, "dfglm:npqruy")) != EOF) {
+	while ((ch = getopt(argc, argv, "dfglm:napqruy")) != EOF) {
 		switch (ch) {
 		case 'd':
 			debug++;
@@ -146,6 +146,7 @@
 			break;
 
 		case 'p':
+		case 'a':
 			preen++;
 			break;
 
@@ -529,13 +530,14 @@
 static void
 usage()
 {
-	(void) fprintf(stderr, "usage: %s [-dfl m [mode] npqruy] special-device\n", progname);
+	(void) fprintf(stderr, "usage: %s [-dfl m [mode] npaqruy] special-device\n", progname);
 	(void) fprintf(stderr, "  d = output debugging info\n");
 	(void) fprintf(stderr, "  f = force fsck even if clean (preen only) \n");
 	(void) fprintf(stderr, "  l = live fsck (lock down and test-only)\n");
 	(void) fprintf(stderr, "  m arg = octal mode used when creating lost+found directory \n");
 	(void) fprintf(stderr, "  n = assume a no response \n");
 	(void) fprintf(stderr, "  p = just fix normal inconsistencies \n");
+	(void) fprintf(stderr, "  a = like -p for compatibility \n");
 	(void) fprintf(stderr, "  q = quick check returns clean, dirty, or failure \n");
 	(void) fprintf(stderr, "  r = rebuild catalog btree \n");
 	(void) fprintf(stderr, "  u = usage \n");