diff --git a/Resources/js/widget/file_upload.js b/Resources/js/widget/file_upload.js
index 7e761034c4b49029e41bba9c1bde8b5d2810db7e..a762e9ea08a202efb41be8bbcc6025f2164c791c 100644
--- a/Resources/js/widget/file_upload.js
+++ b/Resources/js/widget/file_upload.js
@@ -54,7 +54,7 @@
         updateButtonVisibility();
 
         // Activation
-        $this.fileupload($.extend(
+        $button.fileupload($.extend(
             options,
             {
                 type: 'PUT',