diff --git a/pkg/arvo/sys/vane/clay.hoon b/pkg/arvo/sys/vane/clay.hoon
index ab25755d0..dac13a039 100644
--- a/pkg/arvo/sys/vane/clay.hoon
+++ b/pkg/arvo/sys/vane/clay.hoon
@@ -4904,6 +4904,8 @@
       ``[%domes !>(`cone`domes)]
     ==
   ::
+  ::  Check for refcount errors
+  ::
   ++  sweep
     ^-  (list [need=@ud have=@ud leak])
     =/  marked=(map leak [need=@ud have=@ud])