diff --git a/src/conf-parameter.hpp b/src/conf-parameter.hpp
index aedffac..32b343c 100644
--- a/src/conf-parameter.hpp
+++ b/src/conf-parameter.hpp
@@ -35,19 +35,17 @@
 
 namespace nlsr {
 
+enum class SyncProtocol {
+  CHRONOSYNC,
+  PSYNC,
+};
+
 enum {
   LSA_REFRESH_TIME_MIN = 240,
   LSA_REFRESH_TIME_DEFAULT = 1800,
   LSA_REFRESH_TIME_MAX = 7200
 };
 
-enum SyncProtocol {
-#ifdef HAVE_CHRONOSYNC
-  SYNC_PROTOCOL_CHRONOSYNC,
-#endif
-  SYNC_PROTOCOL_PSYNC
-};
-
 enum {
   LSA_INTEREST_LIFETIME_MIN = 1,
   LSA_INTEREST_LIFETIME_DEFAULT = 4,
@@ -528,7 +526,7 @@
 
   ndn::time::milliseconds m_syncInterestLifetime;
 
-  SyncProtocol m_syncProtocol;
+  SyncProtocol m_syncProtocol = SyncProtocol::PSYNC;
 
 PUBLIC_WITH_TESTS_ELSE_PRIVATE:
   // must be incremented when breaking changes are made to sync