diff --git a/sys/kern/subr_witness.c b/sys/kern/subr_witness.c
index 6b515b98abf..ae54d5ae193 100644
--- a/sys/kern/subr_witness.c
+++ b/sys/kern/subr_witness.c
@@ -330,6 +330,12 @@ static struct witness_order_list_entry order_lists[] = {
 	{ "nfsd_mtx", &lock_class_mtx_sleep },
 	{ "so_snd", &lock_class_mtx_sleep },
 	{ NULL, NULL },
+	/*
+	 * CDEV
+	 */
+	{ "cdev", &lock_class_mtx_sleep },
+	{ "system map", &lock_class_mtx_sleep },
+	{ NULL, NULL },
 	/*
 	 * spin locks
 	 */