--- a/sys/dev/misc/psm/psm.c
+++ b/sys/dev/misc/psm/psm.c
@@ -2022,7 +2022,7 @@
 		goto out;
 
 	/* Done */
-	sc->cdev = make_dev(&psm_ops, unit, 0, 0, 0666, "psm%d", unit);
+	sc->cdev = make_dev(&psm_ops, unit, 0, 0, 0600, "psm%d", unit);
 	if (sc->cdev == NULL)
 		goto out;
 	sc->cdev->si_drv1 = sc;