diff --git a/library/think/Model.php b/library/think/Model.php
index 05d56f95..6f74d388 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -692,7 +692,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                 if (isset($this->data[$key])) {
                     throw new Exception('bind attr has exists:' . $key);
                 } else {
-                    $this->data[$key] = $model->$attr;
+                    $this->data[$key] = $model->getAttr($attr);
                 }
             }
         }