diff --git a/collects/typed-scheme/typed-scheme.rkt b/collects/typed-scheme/typed-scheme.rkt
index f22a7f5098..1ffb4a199b 100644
--- a/collects/typed-scheme/typed-scheme.rkt
+++ b/collects/typed-scheme/typed-scheme.rkt
@@ -43,7 +43,7 @@
                ([(lambda (e) (and catch-errors? (exn:fail? e) (not (exn:fail:syntax? e))))
                  (lambda (e) (tc-error "Internal error: ~a" e))])]
            [parameterize (;; enable fancy printing?
-                          [custom-printer #f]
+                          [custom-printer #t]
                           ;; a cheat to avoid units
                           [infer-param infer]
                           ;; do we report multiple errors