diff --git a/app/Http/Controllers/ExportController.php b/app/Http/Controllers/ExportController.php
index 4f1b2bc6a7..feb72426b6 100644
--- a/app/Http/Controllers/ExportController.php
+++ b/app/Http/Controllers/ExportController.php
@@ -74,7 +74,7 @@ class ExportController extends Controller
             ->header('Expires', '0')
             ->header('Cache-Control', 'must-revalidate, post-check=0, pre-check=0')
             ->header('Pragma', 'public')
-            ->header('Content-Length', filesize($file));
+            ->header('Content-Length', $disk->size($file));
 
     }