diff --git a/CHANGES b/CHANGES
index 8beb1c99f8d..8d77bbaaa9e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,8 @@
                                                          -*- coding: utf-8 -*-
 Changes with Apache Traffic Server 5.3.3
 
+  *) [TS-4227] Remove auto_ptr in SPDY plugin.
+
   *) [TS-3634] Replace auto_ptr with ats_scoped_object.
 
 
diff --git a/plugins/experimental/spdy/io.cc b/plugins/experimental/spdy/io.cc
index 2329bdc7f7d..d387b898bf2 100644
--- a/plugins/experimental/spdy/io.cc
+++ b/plugins/experimental/spdy/io.cc
@@ -19,7 +19,7 @@
 #include <ts/ts.h>
 #include <spdy/spdy.h>
 #include "io.h"
-#include <memory>
+#include "ink_memory.h"
 
 spdy_io_control::spdy_io_control(TSVConn v) : vconn(v), input(), output(), streams(), last_stream_id(0)
 {
@@ -60,7 +60,7 @@ spdy_io_control::valid_client_stream_id(unsigned stream_id) const
 spdy_io_stream *
 spdy_io_control::create_stream(unsigned stream_id)
 {
-  std::auto_ptr<spdy_io_stream> ptr(new spdy_io_stream(stream_id));
+  ats_scoped_obj<spdy_io_stream> ptr(new spdy_io_stream(stream_id));
   std::pair<stream_map_type::iterator, bool> result;
 
   result = streams.insert(std::make_pair(stream_id, ptr.get()));