diff --git a/dssm/network_conf.py b/dssm/network_conf.py
index f0f2e1a209debe6bfd3c826048c0afc0b5f9dd66..430db232db7734368d1261adcaef87a1360c0f28 100644
--- a/dssm/network_conf.py
+++ b/dssm/network_conf.py
@@ -102,8 +102,8 @@ class DSSM(object):
         '''
         A GRU sentence vector learner.
         '''
-        gru = paddle.layer.gru_memory(
-            input=emb, )
+        gru = paddle.networks.simple_gru(
+            input=emb, size=256)
         sent_vec = paddle.layer.last_seq(gru)
         return sent_vec