diff --git a/src/danog/MadelineProto/Connection.php b/src/danog/MadelineProto/Connection.php
index 7809e2af..3b2bfe0d 100644
--- a/src/danog/MadelineProto/Connection.php
+++ b/src/danog/MadelineProto/Connection.php
@@ -407,6 +407,9 @@ class Connection
                 if (isset($arguments['file']['iv'])) {
                     $arguments['message']['media']['iv'] = $arguments['file']['iv'];
                 }
+                if (isset($arguments['file']['size'])) {
+                    $arguments['message']['media']['size'] = $arguments['file']['size'];
+                }
             }
             $arguments['queuePromise'] = new Deferred;
             return $arguments['queuePromise'];
diff --git a/src/danog/MadelineProto/MTProtoTools/Files.php b/src/danog/MadelineProto/MTProtoTools/Files.php
index 1711a401..430ed01a 100644
--- a/src/danog/MadelineProto/MTProtoTools/Files.php
+++ b/src/danog/MadelineProto/MTProtoTools/Files.php
@@ -222,6 +222,7 @@ trait Files
             $constructor['key_fingerprint'] = $fingerprint;
             $constructor['key'] = $key;
             $constructor['iv'] = $iv;
+            $constructor['size'] = $size;
         }
         $constructor['md5_checksum'] = '';
         //\hash_final($ctx);