diff --git a/static/js/pandora/item.js b/static/js/pandora/item.js
index 5f945014e..846054b16 100644
--- a/static/js/pandora/item.js
+++ b/static/js/pandora/item.js
@@ -64,8 +64,10 @@ pandora.ui.item = function() {
             });
             pandora.site.video.resolutions.forEach(function(resolution) {
                 video[resolution] = Ox.range(result.data.parts).map(function(i) {
-                    return pandora.site.site.videoprefix + '/' + pandora.user.ui.item + '/'
-                        + resolution + 'p' + (i + 1) + '.' + pandora.user.videoFormat;
+                    var part = (i + 1),
+                        prefix = pandora.site.site.videoprefix.replace('PART', part);
+                    return prefix + '/' + pandora.user.ui.item + '/'
+                        + resolution + 'p' + part + '.' + pandora.user.videoFormat;
                 });
             });
         }