diff --git a/sys/kern/subr_witness.c b/sys/kern/subr_witness.c
index aa46edb..f784a45 100644
--- a/sys/kern/subr_witness.c
+++ b/sys/kern/subr_witness.c
@@ -690,6 +690,10 @@ static struct witness_order_list_entry order_lists[] = {
 	{ "pmc-leaf", &lock_class_mtx_spin },
 #endif
 	{ "blocked lock", &lock_class_mtx_spin },
+#ifdef XEN
+	{ "XCONS LOCK", &lock_class_mtx_spin },
+	{ "xp", &lock_class_mtx_spin },
+#endif	
 	{ NULL, NULL },
 	{ NULL, NULL }
 };