diff --git a/collects/typed-scheme/typed-scheme.ss b/collects/typed-scheme/typed-scheme.ss
index e9249d87..5646b76a 100644
--- a/collects/typed-scheme/typed-scheme.ss
+++ b/collects/typed-scheme/typed-scheme.ss
@@ -49,7 +49,7 @@
                ([(lambda (e) (and catch-errors? (exn:fail? e) (not (exn:fail:syntax? e))))
                  (lambda (e) (tc-error "Internal error: ~a" e))])]
            [parameterize (;; disable fancy printing
-                          [custom-printer #f]
+                          [custom-printer #t]
                           ;; a cheat to avoid units
                           [infer-param infer]
                           ;; do we report multiple errors