diff --git a/model/sync-ccnx-wrapper.h b/model/sync-ccnx-wrapper.h
index fa1356b..037d2d2 100644
--- a/model/sync-ccnx-wrapper.h
+++ b/model/sync-ccnx-wrapper.h
@@ -36,7 +36,7 @@
 #include <boost/thread/thread.hpp>
 #include <boost/function.hpp>
 #include <string>
-#include "sync-data-buffer.h"
+
 /**
  * \defgroup sync SYNC protocol
  *
@@ -84,8 +84,8 @@
    * @param dataCallback the callback function to deal with the returned data
    * @return the return code of ccn_express_interest
    */
-   int sendInterest(std::string strInterest, boost::function<void
-   (boost::shared_ptr<DataBuffer>)> dataCallback);
+   int sendInterest(std::string strInterest, boost::function<void (std::string)>
+   dataCallback);
 
   /**
    * @brief set Interest filter (specify what interest you want to receive
@@ -106,8 +106,7 @@
    * @param freshness the freshness time for the data object
    * @return code generated by ccnx library calls, >0 if success
    */
-   int publishData(std::string name, boost::shared_ptr<DataBuffer> dataBuffer,
-   int freshness);
+   int publishData(std::string name, std::string dataBuffer, int freshness);
 
 };