diff --git a/preload.js b/preload.js
index 32f867377..faebdd71e 100644
--- a/preload.js
+++ b/preload.js
@@ -74,6 +74,9 @@
   const {autoOrientImage} = require('./js/modules/auto_orient_image');
   window.autoOrientImage = autoOrientImage;
 
+  window.Whisper = window.Whisper || {};
+  window.Whisper.Attachment = require('./js/modules/types/attachment');
+
   // We pull this in last, because the native module involved appears to be sensitive to
   //   /tmp mounted as noexec on Linux.
   require('./js/spell_check');