diff --git a/arvo/hoon.hoon b/arvo/hoon.hoon
index 76e184794..215ba8ee2 100644
--- a/arvo/hoon.hoon
+++ b/arvo/hoon.hoon
@@ -1088,7 +1088,7 @@
     |-  ^-  @
     =+  c=(fnv (mix p.b (fnv q.b)))
     =+  d=(mix (rsh 0 31 c) (end 0 31 c))
-    ?.  =(0 c)  c
+    ?.  =(0 d)  d
     $(q.b +(q.b))
   =+  b=2.166.136.261
   |-  ^-  @