diff --git a/python/paddle/trainer_config_helpers/networks.py b/python/paddle/trainer_config_helpers/networks.py
index 9776ae18057d57dd994fac8b62090258252922c6..8bfe56d795e394efffabb61f145b1a20d806447d 100644
--- a/python/paddle/trainer_config_helpers/networks.py
+++ b/python/paddle/trainer_config_helpers/networks.py
@@ -1119,8 +1119,9 @@ def simple_gru2(input,
     :param gru_bias_attr: bias parameter attribute of gru layer, 
                           False means no bias, None means default bias.
     :type gru_bias_attr: ParameterAttribute|False|None
-    :param gru_layer_attr: Extra attribute of the gru layer.
-    :type gru_layer_attr: ExtraLayerAttribute
+    :param gru_param_attr: param parameter attribute of gru layer,
+                          None means default param.
+    :type gru_param_attr: ParameterAttribute|None
     :return: the gru group.
     :rtype: LayerOutput
     """