diff --git a/attachment_preview/static/src/js/viewerjs_tweaks.js b/attachment_preview/static/src/js/viewerjs_tweaks.js
index 0adb7d14..73d2c847 100644
--- a/attachment_preview/static/src/js/viewerjs_tweaks.js
+++ b/attachment_preview/static/src/js/viewerjs_tweaks.js
@@ -29,4 +29,4 @@ Viewer = function(plugin, parameters)
         alert('Unsupported file type');
     }
     return original_Viewer(plugin, parameters);
-}
+};