diff --git a/client/dcwebui.js b/client/dcwebui.js
index b161f49..2dbeee4 100644
--- a/client/dcwebui.js
+++ b/client/dcwebui.js
@@ -46,8 +46,8 @@ var fmtBytes = function(b) {
 	
 	var k = 1024;
 	var sizes = [' B', ' KiB', ' MiB', ' GiB', ' TiB'];
-	var i = Math.floor(Math.log(bytes) / Math.log(k));
-	return parseFloat((bytes / Math.pow(k, i)).toFixed(3)) + sizes[i];
+	var i = Math.floor(Math.log(b) / Math.log(k));
+	return parseFloat((b / Math.pow(k, i)).toFixed(3)) + sizes[i];
 };