diff -r 42b6c75aac48 -r 327a1b6dd944 usr/src/cmd/zfs/zfs_main.c
--- a/usr/src/cmd/zfs/zfs_main.c	Tue Jan 20 15:29:39 2009 -0800
+++ b/usr/src/cmd/zfs/zfs_main.c	Tue Jan 20 17:47:08 2009 -0700
@@ -20,7 +20,7 @@
  */
 
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -2440,7 +2440,7 @@
 
 	bzero(&flags, sizeof (recvflags_t));
 	/* check options */
-	while ((c = getopt(argc, argv, ":dnvF")) != -1) {
+	while ((c = getopt(argc, argv, ":dnuvF")) != -1) {
 		switch (c) {
 		case 'd':
 			flags.isprefix = B_TRUE;
@@ -2448,6 +2448,9 @@
 		case 'n':
 			flags.dryrun = B_TRUE;
 			break;
+		case 'u':
+			flags.nomount = B_TRUE;
+			break;
 		case 'v':
 			flags.verbose = B_TRUE;
 			break;