diff --git a/arvo/hoon.hoon b/arvo/hoon.hoon
index c8538263ad..a64587d228 100644
--- a/arvo/hoon.hoon
+++ b/arvo/hoon.hoon
@@ -2495,7 +2495,7 @@
            ['.' d]
          =+  e=(dec (met 2 c))
          =+  f=(rsh 2 e c)
-         [(add ?:((lte f 9) 48 87) f) $(c (end 2 e a))]
+         [(add ?:((lte f 9) 48 87) f) $(c (end 2 e c))]
     ' '  ['.' d]
     '.'  ['~' '.' d]
     '~'  ['~' '~' d]