diff --git a/static/js/upload.js b/static/js/upload.js
index 01a8a8b..5868fcd 100644
--- a/static/js/upload.js
+++ b/static/js/upload.js
@@ -32,7 +32,7 @@ $(document).ready(function() {
             $('#status').html('<div id="progress" style="background-color: #666;height:20px;width:0%" /><div id="progressstatus" style="background-color: #fff;">uploading</div>');
             ChunkUploader({
                 file: file,
-                url: '/add',
+                url: UPLOAD_URL,
                 data: {
                     'firefogg': 1,
                     'name': file.name
diff --git a/templates/index.html b/templates/index.html
index bf9848c..d38acb9 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -2,6 +2,9 @@
 <html>
     <head>
 <title>videopdf</title>
+<script type="text/javascript">
+var UPLOAD_URL = "{{PREFIX}}/add";
+</script>
 <script src="{{PREFIX}}/static/js/jquery.js" type="text/javascript"></script>
 <script src="{{PREFIX}}/static/js/chunkupload.js" type="text/javascript"></script>
 <script src="{{PREFIX}}/static/js/upload.js?1" type="text/javascript"></script>
