diff --git a/lib/client/directory.js b/lib/client/directory.js
index fc95ebe8..a388259b 100644
--- a/lib/client/directory.js
+++ b/lib/client/directory.js
@@ -99,7 +99,7 @@
     function percent(i, n, per) {
         var value;
         
-        if (!per)
+        if (typeof per === 'undefined')
             per = 100;
         
         value = Math.round(i * per / n);