diff --git a/sys/hoon.hoon b/sys/hoon.hoon
index 3c88824d1..95f3bbd73 100644
--- a/sys/hoon.hoon
+++ b/sys/hoon.hoon
@@ -8427,6 +8427,7 @@
             ::
             ref/span
         ==
+    ~+
     ::  :span: subject refurbished to reference namespace
     ::
     ^-  span