--- a/usr/src/lib/libzfs/common/libzfs_dataset.c	Thu Feb 09 15:38:36 2006 -0800
+++ b/usr/src/lib/libzfs/common/libzfs_dataset.c	Thu Feb 09 16:06:59 2006 -0800
@@ -1249,6 +1249,7 @@
 			struct mnttab search = { 0 }, entry;
 
 			search.mnt_special = (char *)zhp->zfs_name;
+			search.mnt_fstype = MNTTYPE_ZFS;
 			rewind(mnttab_file);
 
 			if (getmntany(mnttab_file, &entry, &search) == 0)