diff --git a/src/danog/MadelineProto/TL/TL.php b/src/danog/MadelineProto/TL/TL.php
index a581eaa8..4f725dab 100644
--- a/src/danog/MadelineProto/TL/TL.php
+++ b/src/danog/MadelineProto/TL/TL.php
@@ -153,7 +153,7 @@ trait TL
 
                 return $concat;
             case 'Bool':
-                return $this->serialize_bool((bool)$object);
+                return $this->serialize_bool((bool) $object);
             case 'true':
                 return;
             case '!X':