diff --git a/pkg/arvo/lib/bip/b158.hoon b/pkg/arvo/lib/bip/b158.hoon
index eb0eb7f0f8..07b0204825 100644
--- a/pkg/arvo/lib/bip/b158.hoon
+++ b/pkg/arvo/lib/bip/b158.hoon
@@ -157,7 +157,7 @@
   ++  to-range
     |=  [item=byts f=@ k=byts]
     ^-  @
-    (rsh [0 64] (mul f (swp 3 dat:(siphash k item))))
+    (rsh [0 64] (mul f (rev 3 (siphash k item))))
   ::  +set-construct: return sorted hashes of scriptpubkeys
   ::
   ++  set-construct