diff --git a/collects/macro-debugger/analysis/check-requires-script.rkt b/collects/macro-debugger/analysis/check-requires-script.rkt
index 1b724b1e40..86789f9e8d 100644
--- a/collects/macro-debugger/analysis/check-requires-script.rkt
+++ b/collects/macro-debugger/analysis/check-requires-script.rkt
@@ -41,7 +41,7 @@ Example (from racket root directory):
            (when (show-keep?)
              (printf "KEEP ~a at ~a~a\n"
                      (mpi->key mpi) phase
-                     (if comment (format "(~a)" comment #f) "")))]
+                     (if comment (format " (~a)" comment) "")))]
           [(list 'bypass mpi phase)
            (when (show-bypass?)
              (printf "BYPASS ~a at ~a\n" (mpi->key mpi) phase))]