diff --git a/src/validate.janet b/src/validate.janet
index fdacbab..eb302eb 100644
--- a/src/validate.janet
+++ b/src/validate.janet
@@ -435,12 +435,12 @@ Deferred until a later iteration of Ludus:
  (def rest-arities (keys (arities :rest)))
  (when (empty? rest-arities)
   (array/push (validator :errors)
-   {:node ast :msg "mismatched arity"})
+   {:node ast :msg "wrong number of arguments"})
   (break validator))
  (def rest-min (min ;rest-arities))
  (when (< num-args rest-min)
   (array/push (validator :errors)
-   {:node ast :msg "mismatched arity"}))
+   {:node ast :msg "wrong number of arguments"}))
  validator)
 
 (defn- kw-root [validator]