diff --git a/python/paddle/v2/dataset/__init__.py b/python/paddle/v2/dataset/__init__.py
index c1acbecd9c313b02d6d33d2d04fd33fc1a8b026e..38056fe0a9496bcb5de76634bbab267e324dc2a4 100644
--- a/python/paddle/v2/dataset/__init__.py
+++ b/python/paddle/v2/dataset/__init__.py
@@ -36,7 +36,7 @@ __all__ = [
     'cifar',
     'movielens',
     'conll05',
-    'sentiment'
+    'sentiment',
     'uci_housing',
     'wmt14',
     'wmt16',