diff --git a/python/paddle/fluid/layers/io.py b/python/paddle/fluid/layers/io.py
index f4481e1df9d727c0725b617f2138a8dae1c16dd8..08f6d66a6524f6cf44fa9abd86df90874b039b53 100644
--- a/python/paddle/fluid/layers/io.py
+++ b/python/paddle/fluid/layers/io.py
@@ -545,7 +545,11 @@ def py_reader(capacity,
 
     reader = monkey_patch_reader_methods(main_prog_var)
     if use_double_buffer:
-        reader = double_buffer(reader, name=double_buffer_name)
+        double_buffer_reader = double_buffer(reader, name=double_buffer_name)
+        # we return a double buffer reader. However, the reset method comes from
+        # py_reader.
+        double_buffer_reader.reset = reader.reset
+        reader = double_buffer_reader
     return reader, feed_queue