diff --git a/ndn-cpp/encoding/BinaryXMLEncoder.hpp b/ndn-cpp/encoding/BinaryXMLEncoder.hpp
index de00a97..1fd4244 100644
--- a/ndn-cpp/encoding/BinaryXMLEncoder.hpp
+++ b/ndn-cpp/encoding/BinaryXMLEncoder.hpp
@@ -9,6 +9,7 @@
 
 #include <cstdlib>
 #include <stdexcept>
+#include <vector>
 #include "../c/encoding/BinaryXMLEncoder.h"
 
 namespace ndn {
@@ -44,6 +45,15 @@
    */
   struct ndn_BinaryXMLEncoder *getEncoder() { return &base_; }
   
+  /**
+   * Copy the encoded bytes to the end of the buffer.
+   * @param buffer a vector to receive the copy
+   */
+  void appendTo(std::vector<unsigned char> &buffer) 
+  {
+    buffer.insert(buffer.end(), base_.output.array, base_.output.array + base_.offset);
+  }
+  
 private:
   struct ndn_BinaryXMLEncoder base_;
 };