diff --git a/include/sync-logic.h b/include/sync-logic.h
index daa6e2f..49cc625 100644
--- a/include/sync-logic.h
+++ b/include/sync-logic.h
@@ -109,6 +109,9 @@
    */
   void remove (const std::string &prefix);
 
+  std::string
+  getRootDigest();
+
 #ifdef _DEBUG
   Scheduler &
   getScheduler () { return m_scheduler; }