diff --git a/promise/promise_list.py b/promise/promise_list.py
index de142f9..eeba766 100644
--- a/promise/promise_list.py
+++ b/promise/promise_list.py
@@ -130,7 +130,7 @@ def _promise_rejected(self, reason, promise):
         # assert not self.is_resolved
         # assert isinstance(self._values, Iterable)
         self._total_resolved += 1
-        self._reject(reason, traceback=promise._traceback)
+        self._reject(reason, traceback=promise._target()._traceback)
         return True
 
     @property