diff --git a/sbin/mount/mntopts.h b/sbin/mount/mntopts.h
--- a/sbin/mount/mntopts.h
+++ b/sbin/mount/mntopts.h
@@ -58,6 +58,7 @@
 #define MOPT_NFS4ACLS		{ "nfsv4acls",	0, MNT_NFS4ACLS, 0 }
 #define MOPT_AUTOMOUNTED	{ "automounted",0, MNT_AUTOMOUNTED, 0 }
 #define MOPT_UNTRUSTED		{ "untrusted",  0, MNT_UNTRUSTED, 0 }
+#define MOPT_IGNORE		{ "ignore",     0, MNT_IGNORE, 0 }
 
 /* Control flags. */
 #define MOPT_FORCE		{ "force",	0, MNT_FORCE, 0 }
diff --git a/sbin/mount/mount.8 b/sbin/mount/mount.8
--- a/sbin/mount/mount.8
+++ b/sbin/mount/mount.8
@@ -375,6 +375,11 @@
 This option is intended to be used when mounting file systems
 from untrusted media such as USB memory sticks or other
 externally-provided media.
+.It Cm ignore
+Information about the filesystem is not displayed by default by
+.Xr df 1
+and
+.Nm .
 .El
 .Pp
 Any additional options specific to a file system type that is not
diff --git a/sys/kern/vfs_mount.c b/sys/kern/vfs_mount.c
--- a/sys/kern/vfs_mount.c
+++ b/sys/kern/vfs_mount.c
@@ -972,6 +972,12 @@
 		} else if (strcmp(opt->name, "noemptydir") == 0) {
 			fsflags &= ~MNT_EMPTYDIR;
 			do_freeopt = 1;
+		} else if (strcmp(opt->name, "ignore") == 0) {
+			fsflags |= MNT_IGNORE;
+			do_freeopt = 1;
+		} else if (strcmp(opt->name, "noignore") == 0) {
+			fsflags &= ~MNT_IGNORE;
+			do_freeopt = 1;
 		}
 		if (do_freeopt)
 			vfs_freeopt(optlist, opt);
diff --git a/sys/sys/mount.h b/sys/sys/mount.h
--- a/sys/sys/mount.h
+++ b/sys/sys/mount.h
@@ -362,6 +362,7 @@
 	{ MNT_RELOAD,		"reload" },				\
 	{ MNT_FORCE,		"force" },				\
 	{ MNT_SNAPSHOT,		"snapshot" },				\
+	{ MNT_IGNORE,		"ignore" },				\
 	{ 0, NULL }
 #endif