diff --git a/src/conf-parameter.cpp b/src/conf-parameter.cpp
index f0d41cb..5ffca5b 100644
--- a/src/conf-parameter.cpp
+++ b/src/conf-parameter.cpp
@@ -28,6 +28,9 @@
 
 INIT_LOGGER(ConfParameter);
 
+// To be changed when breaking changes are made to sync
+const uint64_t ConfParameter::SYNC_VERSION = 4;
+
 void
 ConfParameter::writeLog()
 {
@@ -59,4 +62,21 @@
   NLSR_LOG_INFO("Routing calculation interval:  " << m_routingCalcInterval);
 }
 
+void
+ConfParameter::setNetwork(const ndn::Name& networkName)
+{
+  m_network = networkName;
+
+  m_chronosyncPrefix.append("localhop");
+  m_chronosyncPrefix.append(m_network);
+  m_chronosyncPrefix.append("NLSR");
+  m_chronosyncPrefix.append("sync");
+  m_chronosyncPrefix.appendVersion(SYNC_VERSION);
+
+  m_lsaPrefix.append("localhop");
+  m_lsaPrefix.append(m_network);
+  m_lsaPrefix.append("NLSR");
+  m_lsaPrefix.append("LSA");
+}
+
 } // namespace nlsr
diff --git a/src/conf-parameter.hpp b/src/conf-parameter.hpp
index ac32e04..cac002a 100644
--- a/src/conf-parameter.hpp
+++ b/src/conf-parameter.hpp
@@ -24,6 +24,7 @@
 
 #include "common.hpp"
 #include "logger.hpp"
+#include "test-access-control.hpp"
 
 #include <iostream>
 #include <boost/cstdint.hpp>
@@ -146,20 +147,7 @@
   }
 
   void
-  setNetwork(const ndn::Name& networkName)
-  {
-    m_network = networkName;
-
-    m_chronosyncPrefix.append("localhop");
-    m_chronosyncPrefix.append(m_network);
-    m_chronosyncPrefix.append("NLSR");
-    m_chronosyncPrefix.append("sync");
-
-    m_lsaPrefix.append("localhop");
-    m_lsaPrefix.append(m_network);
-    m_lsaPrefix.append("NLSR");
-    m_lsaPrefix.append("LSA");
-  }
+  setNetwork(const ndn::Name& networkName);
 
   const ndn::Name&
   getNetwork() const
@@ -478,6 +466,9 @@
 
   std::string m_seqFileDir;
   ndn::time::milliseconds m_syncInterestLifetime;
+
+PUBLIC_WITH_TESTS_ELSE_PRIVATE:
+  static const uint64_t SYNC_VERSION;
 };
 
 } // namespace nlsr