diff --git a/python/paddle/trainer_config_helpers/layers.py b/python/paddle/trainer_config_helpers/layers.py
index c97e6c0a36774caaa4fd8f8130220849975451a0..f9501ca6a01785f4cb2fbe21bca19bf9a3295358 100644
--- a/python/paddle/trainer_config_helpers/layers.py
+++ b/python/paddle/trainer_config_helpers/layers.py
@@ -921,7 +921,7 @@ def data_layer(name, size, depth=None, height=None, width=None,
 
         data = data_layer(name="input", size=1000)
 
-    :param name: The name of this layer. It is optional.
+    :param name: The name of this layer.
     :type name: basestring
     :param size: Size of this data layer.
     :type size: int