diff --git a/guix/utils.scm b/guix/utils.scm
index 2c56c8b2e0..2920fa7684 100644
--- a/guix/utils.scm
+++ b/guix/utils.scm
@@ -963,7 +963,6 @@ (define* (pretty-print-table rows #:key (max-column-width 20))
                               (map (cut min <> max-column-width)
                                    column-widths)))
          (fmt (string-append (string-join column-formats "\t") "\t~a")))
-    (setvbuf (current-output-port) 'block) ;for better performance
     (for-each (cut format #t "~?~%" fmt <>) rows)))
 
 ;;; Local Variables: