diff --git a/src/libplctag/LibPlcTag.cs b/src/libplctag/LibPlcTag.cs
index afc24a7d..30f05ce1 100644
--- a/src/libplctag/LibPlcTag.cs
+++ b/src/libplctag/LibPlcTag.cs
@@ -66,6 +66,8 @@ static private void ensureSubscribeToEvents()
             var statusAfterRegistration = (Status)_native.plc_tag_register_logger(loggerDelegate);
             if (statusAfterRegistration != Status.Ok)
                 throw new LibPlcTagException(statusAfterRegistration);
+
+            alreadySubscribedToEvents = true;
         }
 
         static void invokeLogEvent(int tag_id, int debug_level, string message)