diff --git a/model/sync-logic.h b/model/sync-logic.h
index 87b82fc..d5e6a0f 100644
--- a/model/sync-logic.h
+++ b/model/sync-logic.h
@@ -60,6 +60,8 @@
    */
   void addLocalNames (const std::string &prefix, uint32_t session, uint32_t seq);
 
+  void checkAgain (const std::string &interest, DigestPtr digest);
+
   /**
    * @brief respond to the Sync Interest; a lot of logic needs to go in here
    * @param interest the Sync Interest in string format
@@ -68,7 +70,7 @@
 
   /**
    * @brief process the fetched sync data
-   * @param name name ???
+   * @param name the data name
    * @param dataBuffer the sync data
    */
   void processSyncData (const std::string &name, const std::string &dataBuffer);
@@ -85,6 +87,8 @@
   LogicCallback m_fetch;
   CcnxWrapperPtr m_ccnxHandle;
 
+  boost::thread m_thread;
+
   static const int m_syncResponseFreshness = 2;
 };