diff --git a/app/js/lib/mtproto_wrapper.js b/app/js/lib/mtproto_wrapper.js
index 1169057d..0d55de66 100644
--- a/app/js/lib/mtproto_wrapper.js
+++ b/app/js/lib/mtproto_wrapper.js
@@ -492,7 +492,7 @@ angular.module('izhukov.mtproto.wrapper', ['izhukov.utils', 'izhukov.mtproto'])
               }, {
                 dcID: dcID,
                 fileDownload: true,
-                singleInRequest: true,
+                singleInRequest: window.safari !== undefined,
                 createNetworker: true
               });
             }, 2).then(function (result) {