--- a/src/main/java/org/msgpack/unpacker/MessagePackBufferUnpacker.java	Sat Oct 18 22:20:05 2014 +0900
+++ b/src/main/java/org/msgpack/unpacker/MessagePackBufferUnpacker.java	Fri Jan 09 14:12:10 2015 +0900
@@ -17,10 +17,12 @@
 //
 package org.msgpack.unpacker;
 
+import java.io.IOException;
 import java.nio.ByteBuffer;
 
 import org.msgpack.MessagePack;
 import org.msgpack.io.LinkedBufferInput;
+import org.msgpack.io.StreamInput;
 
 public class MessagePackBufferUnpacker extends MessagePackUnpacker implements BufferUnpacker {
     private static final int DEFAULT_BUFFER_SIZE = 512; // TODO default buffer
@@ -104,4 +106,8 @@
         ((LinkedBufferInput) in).clear();
         reset();
     }
+
+    public byte[] getSerializedByteArray(int len) throws IOException {
+        return ((StreamInput)in).getRawByteArray(len);
+    }
 }

--- a/src/main/java/org/msgpack/unpacker/MessagePackUnpacker.java	Sat Oct 18 22:20:05 2014 +0900
+++ b/src/main/java/org/msgpack/unpacker/MessagePackUnpacker.java	Fri Jan 09 14:12:10 2015 +0900
@@ -682,8 +682,9 @@
     public void resetReadByteCount() {
         in.resetReadByteCount();
     }
-    
+
     public byte[] getSerializedByteArray(int len) throws IOException {
+        byte b = getHeadByte();
         return ((StreamInput)in).getRawByteArray(len);
     }
 }