diff --git a/ecal/core/src/registration/ecal_process_registration.cpp b/ecal/core/src/registration/ecal_process_registration.cpp
index 1ed86db832..740ceba5eb 100644
--- a/ecal/core/src/registration/ecal_process_registration.cpp
+++ b/ecal/core/src/registration/ecal_process_registration.cpp
@@ -70,18 +70,7 @@ eCAL::Registration::Sample eCAL::Registration::GetProcessRegisterSample()
     }
     else
     {
-      switch (timegate->GetSyncMode())
-      {
-      case CTimeGate::eTimeSyncMode::realtime:
-        process_sample_process.time_sync_state = Registration::eTimeSyncState::tsync_realtime;
-        break;
-      case CTimeGate::eTimeSyncMode::replay:
-        process_sample_process.time_sync_state = Registration::eTimeSyncState::tsync_replay;
-        break;
-      default:
-        process_sample_process.time_sync_state = Registration::eTimeSyncState::tsync_none;
-        break;
-      }
+      process_sample_process.time_sync_state = Registration::eTimeSyncState::tsync_realtime;
     }
     process_sample_process.time_sync_module_name = timegate->GetName();
   }
diff --git a/ecal/core/src/time/ecal_timegate.h b/ecal/core/src/time/ecal_timegate.h
index 09b023ad26..310b920c6c 100644
--- a/ecal/core/src/time/ecal_timegate.h
+++ b/ecal/core/src/time/ecal_timegate.h
@@ -37,9 +37,6 @@ namespace eCAL
   public:
     static std::shared_ptr<CTimeGate> CreateTimegate();
 
-    // TODO: these need to be removed
-    enum eTimeSyncMode { none, realtime, replay };
-
   private:
     CTimeGate(CTimePlugin&& time_plugin, std::string plugin_name);
 
@@ -66,8 +63,6 @@ namespace eCAL
 
     void GetStatus(int& error_, std::string* status_message_);
 
-    eTimeSyncMode GetSyncMode() { return(eTimeSyncMode::realtime); };
-
     CTimePlugin m_time_plugin;
     std::string m_plugin_name;
   };