diff --git a/python/paddle/static/nn/common.py b/python/paddle/static/nn/common.py
old mode 100644
new mode 100755
index 0806d2c29148f77abb2fb9c7ab591154be9efd14..f917b4fa09a507d8e401a7fca85e54a58d924843
--- a/python/paddle/static/nn/common.py
+++ b/python/paddle/static/nn/common.py
@@ -106,6 +106,7 @@ def fc(x,
         weight_attr (ParamAttr, optional): The attribute for the learnable weight.
             The default value is None, and the weight will be initialized to zero.
             For detailed information, please refer to :attr:`paddle.ParamAttr`.
+            Warning, if x is a list of tensor, weight_attr should also be a list of same length.
         bias_attr (ParamAttr|bool, optional): The attribute of the learnable bias. 
             If it is set to False, no bias will be added to the output.
             If it is set to None or one kind of ParamAttr, a bias parameter will