diff --git a/etc/xo/subsystem-list b/etc/xo/subsystem-list
index aeceed00..95e46f7e 100644
--- a/etc/xo/subsystem-list
+++ b/etc/xo/subsystem-list
@@ -15,6 +15,7 @@ xo-stringtable2
 xo-object2
 xo-gc
 xo-type
+xo-allocutil
 xo-alloc
 xo-object
 xo-ordinaltree