diff --git a/pkg/garden/lib/multipart.hoon b/pkg/garden/lib/multipart.hoon
index 0342c46f77..4f047ae57e 100644
--- a/pkg/garden/lib/multipart.hoon
+++ b/pkg/garden/lib/multipart.hoon
@@ -37,7 +37,7 @@
   ++  cut   (jest 'Content-Type: ')
   ++  dim   (jest (cat 3 '--' del))
   ++  nip   (jest '\0d\0a')
-  ++  nab   (more fas urs:ab)
+  ++  nab   (more fas (cook (cury rap 3) (plus qit)))
   ++  nag   (dine ;~(less ;~(plug nip dim) next))
   ++  nod   (dine ;~(less doq next))
   ++  nom   (dine alp)