diff --git a/Resources/js/widget/file_upload.js b/Resources/js/widget/file_upload.js
index 3d402ef958961648683b7fc53ff95e7bd7185c76..e265b02264713fdc7ecc863db7fbe8c29125532d 100644
--- a/Resources/js/widget/file_upload.js
+++ b/Resources/js/widget/file_upload.js
@@ -11,12 +11,10 @@
         var $this             = $(this),
             $button           = $this.find('.fileinput-button'),
             $entries          = $this.find('.fileinput-entries'),
-            prototype         = options.prototype,
             createUrl         = options.createUrl,
             uploadPrototype   = options.uploadPrototype,
             downloadPrototype = options.downloadPrototype;
 
-        delete options.prototype;
         delete options.createUrl;
         delete options.uploadPrototype;
         delete options.downloadPrototype;