diff --git a/src/danog/MadelineProto/TL/PrettyException.php b/src/danog/MadelineProto/TL/PrettyException.php
index c8b49c28..e4635722 100644
--- a/src/danog/MadelineProto/TL/PrettyException.php
+++ b/src/danog/MadelineProto/TL/PrettyException.php
@@ -40,6 +40,6 @@ trait PrettyException
                 $tl = false;
             }
         }
-        $this->tl_trace = $this->tl_trace."['".$init."']";
+        $this->tl_trace = $this->tl_trace.$init !== '' ? "['".$init."']" : '';
     }
 }