diff --git a/src/site.rkt b/src/site.rkt
index 383f0e3..e29a0ed 100644
--- a/src/site.rkt
+++ b/src/site.rkt
@@ -396,7 +396,7 @@
      ,@(for/list ((package-name package-names))
          (define pkg (package-detail package-name))
          `(tr
-           (td (span ((class "last-updated") (style "display: none")) ,(~a (@ pkg last-updated)))
+           (td (span ((class "last-updated-negated") (style "display: none")) ,(~a (- (@ pkg last-updated))))
                ,@(maybe-splice
                   (< (- now (or (@ pkg last-updated) 0)) recent-seconds)
                   `(span ((class "label label-info")) "New")))