diff --git a/trunk/src/app/srs_app_http.cpp b/trunk/src/app/srs_app_http.cpp
index a1768130c..9494b431d 100644
--- a/trunk/src/app/srs_app_http.cpp
+++ b/trunk/src/app/srs_app_http.cpp
@@ -36,6 +36,7 @@ using namespace std;
 #include <srs_app_http_conn.hpp>
 #include <srs_app_json.hpp>
 #include <srs_kernel_utility.hpp>
+#include <srs_protocol_buffer.hpp>
 
 #define SRS_DEFAULT_HTTP_PORT 80
 
diff --git a/trunk/src/rtmp/srs_protocol_buffer.cpp b/trunk/src/rtmp/srs_protocol_buffer.cpp
index b371e2f04..b3e15bf3b 100644
--- a/trunk/src/rtmp/srs_protocol_buffer.cpp
+++ b/trunk/src/rtmp/srs_protocol_buffer.cpp
@@ -34,14 +34,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // @see https://github.com/winlinvip/simple-rtmp-server/issues/241
 #define SOCKET_READ_SIZE 4096
 
-ISrsBufferReader::ISrsBufferReader()
-{
-}
-
-ISrsBufferReader::~ISrsBufferReader()
-{
-}
-
 SrsBuffer::SrsBuffer()
 {
     buffer = new char[SOCKET_READ_SIZE];
diff --git a/trunk/src/rtmp/srs_protocol_buffer.hpp b/trunk/src/rtmp/srs_protocol_buffer.hpp
index ff6ac02c7..13622d96e 100644
--- a/trunk/src/rtmp/srs_protocol_buffer.hpp
+++ b/trunk/src/rtmp/srs_protocol_buffer.hpp
@@ -21,8 +21,8 @@ IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-#ifndef SRS_KERNEL_BUFFER_HPP
-#define SRS_KERNEL_BUFFER_HPP
+#ifndef SRS_PROTOCOL_BUFFER_HPP
+#define SRS_PROTOCOL_BUFFER_HPP
 
 /*
 #include <srs_protocol_buffer.hpp>
@@ -32,18 +32,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <vector>
 
-/**
-* the reader for the buffer to read from whatever channel.
-*/
-class ISrsBufferReader
-{
-public:
-    ISrsBufferReader();
-    virtual ~ISrsBufferReader();
-// for protocol/amf0/msg-codec
-public:
-    virtual int read(void* buf, size_t size, ssize_t* nread) = 0;
-};
+#include <srs_protocol_io.hpp>
 
 /**
 * the buffer provices bytes cache for protocol. generally, 
diff --git a/trunk/src/rtmp/srs_protocol_io.cpp b/trunk/src/rtmp/srs_protocol_io.cpp
index a0dd8999c..723e9d995 100644
--- a/trunk/src/rtmp/srs_protocol_io.cpp
+++ b/trunk/src/rtmp/srs_protocol_io.cpp
@@ -23,6 +23,14 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <srs_protocol_io.hpp>
 
+ISrsBufferReader::ISrsBufferReader()
+{
+}
+
+ISrsBufferReader::~ISrsBufferReader()
+{
+}
+
 ISrsBufferWriter::ISrsBufferWriter()
 {
 }
diff --git a/trunk/src/rtmp/srs_protocol_io.hpp b/trunk/src/rtmp/srs_protocol_io.hpp
index f4b2d4603..41215fd56 100644
--- a/trunk/src/rtmp/srs_protocol_io.hpp
+++ b/trunk/src/rtmp/srs_protocol_io.hpp
@@ -35,8 +35,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <sys/uio.h>
 #endif
 
-#include <srs_protocol_buffer.hpp>
-
 /**
 * the system io reader/writer architecture:
 +---------------+     +--------------------+      +---------------+
@@ -62,6 +60,19 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
           +----------------------------------+
 */
 
+/**
+* the reader for the buffer to read from whatever channel.
+*/
+class ISrsBufferReader
+{
+public:
+    ISrsBufferReader();
+    virtual ~ISrsBufferReader();
+// for protocol/amf0/msg-codec
+public:
+    virtual int read(void* buf, size_t size, ssize_t* nread) = 0;
+};
+
 /**
 * the writer for the buffer to write to whatever channel.
 */
diff --git a/trunk/src/rtmp/srs_protocol_stack.cpp b/trunk/src/rtmp/srs_protocol_stack.cpp
index 6f79e202b..94d75ced7 100644
--- a/trunk/src/rtmp/srs_protocol_stack.cpp
+++ b/trunk/src/rtmp/srs_protocol_stack.cpp
@@ -28,6 +28,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_kernel_stream.hpp>
 #include <srs_core_autofree.hpp>
 #include <srs_kernel_utility.hpp>
+#include <srs_protocol_buffer.hpp>
 
 #include <stdlib.h>
 using namespace std;