diff --git a/python/paddle/v2/topology.py b/python/paddle/v2/topology.py
index 5109dc58fe5128ab4144224f76190c5cfdb69f6a..a20e878d0817d0a75e9c47a44f8765deca99225c 100644
--- a/python/paddle/v2/topology.py
+++ b/python/paddle/v2/topology.py
@@ -92,7 +92,7 @@ class Topology(object):
         data_layers = self.data_layers()
 
         return [(nm, data_layers[nm].data_type)
-                for nm in self.proto().input_layer_names if nm in data_layers]
+                for nm in self.proto().input_layer_names]
 
     def get_layer_proto(self, name):
         for layer in self.__model_config__.layers: