--- sys/compat/opensolaris/kern/opensolaris_vfs.c
+++ sys/compat/opensolaris/kern/opensolaris_vfs.c
@@ -101,7 +101,7 @@
 int
 vfs_optionisset(const vfs_t *vfsp, const char *opt, char **argp)
 {
-	struct vfsoptlist *opts = vfsp->mnt_opt;
+	struct vfsoptlist *opts = vfsp->mnt_optnew;
	int error;
 
	if (opts == NULL)