diff --git a/src/conf-parameter.hpp b/src/conf-parameter.hpp
index 32b343c..1bcf64c 100644
--- a/src/conf-parameter.hpp
+++ b/src/conf-parameter.hpp
@@ -38,6 +38,7 @@
 enum class SyncProtocol {
   CHRONOSYNC,
   PSYNC,
+  SVS,
 };
 
 enum {