diff --git a/sys/contrib/openzfs/lib/libshare/os/freebsd/nfs.c.sav b/sys/contrib/openzfs/lib/libshare/os/freebsd/nfs.c
--- a/sys/contrib/openzfs/lib/libshare/os/freebsd/nfs.c.sav
+++ b/sys/contrib/openzfs/lib/libshare/os/freebsd/nfs.c
@@ -93,7 +93,9 @@
 		return (EOF);
 	newopts[0] = '\0';
 	s = oldopts;
-	while ((o = strsep(&s, "-, ")) != NULL) {
+	while ((o = strsep(&s, ", ")) != NULL) {
+		if (o[0] == '-')
+			o++;
 		if (o[0] == '\0')
 			continue;
 		for (i = 0; i < ARRAY_SIZE(known_opts); ++i) {