diff --git a/racket/src/cs/rumble/error-rewrite.ss b/racket/src/cs/rumble/error-rewrite.ss
index b1ec56d25c..0cd99c2a63 100644
--- a/racket/src/cs/rumble/error-rewrite.ss
+++ b/racket/src/cs/rumble/error-rewrite.ss
@@ -68,7 +68,6 @@
 (define result-arity-msg-tail " values to single value return context")
 
 (define (rewrite-format who str irritants)
-  (#%printf ">> ~s\n" str)
   (cond
    [(equal? str "attempt to reference undefined variable ~s")
     (values (string-append