diff --git a/horse/prob/dist.kk b/horse/prob/dist.kk
index 510e5b7..facbfc8 100644
--- a/horse/prob/dist.kk
+++ b/horse/prob/dist.kk
@@ -3,7 +3,6 @@ module horse/prob/dist
 import std/num/decimal
 
 tail fun pb-step(pn: list<decimal>, pi: decimal, pmfkm1: decimal, pmf: list<decimal>, next: ctx<list<decimal>>): list<decimal>
-  trace("pb-step " ++ pn.show ++ " pi " ++ pi.show ++ " pmf " ++ pmf.show)
   match pn
     Nil -> next ++. Nil // final step overall
     Cons(_, pp) -> match pmf