diff --git a/source/Ox/js/Format.js b/source/Ox/js/Format.js
index 5c3e8ad7..8d1b8d7d 100644
--- a/source/Ox/js/Format.js
+++ b/source/Ox/js/Format.js
@@ -595,7 +595,7 @@ Ox.formatDuration = function(seconds/*, decimals, format*/) {
     var last = Ox.last(arguments),
         format = last == 'short' || last == 'long' ? last : 'none',
         decimals = Ox.isNumber(arguments[1]) ? arguments[1] : 0,
-        seconds = Ox.round(seconds, decimals),
+        seconds = Ox.round(Math.abs(seconds), decimals),
         values = [
             Math.floor(seconds / 31536000),
             Math.floor(seconds % 31536000 / 86400),