diff --git a/src/applications/phragment/controller/PhragmentZIPController.php b/src/applications/phragment/controller/PhragmentZIPController.php
index ab1f204dc9..edc503ee83 100644
--- a/src/applications/phragment/controller/PhragmentZIPController.php
+++ b/src/applications/phragment/controller/PhragmentZIPController.php
@@ -123,6 +123,7 @@ final class PhragmentZIPController extends PhragmentController {
     }
 
     return id(new AphrontRedirectResponse())
+      ->setIsExternal(true)
       ->setURI($file->getDownloadURI($return));
   }