Index: sources/storage/Logger.h
===================================================================
diff -u -r2de712bc338440a4175002a73da38e7f55af3bac -r583d1953c783940c93f22c37b23daadb1ff3a09c
--- sources/storage/Logger.h	(.../Logger.h)	(revision 2de712bc338440a4175002a73da38e7f55af3bac)
+++ sources/storage/Logger.h	(.../Logger.h)	(revision 583d1953c783940c93f22c37b23daadb1ff3a09c)
@@ -35,6 +35,8 @@
 
 #define MIXED_EVENT_DATUM
 
+#undef DISABLE_ACKNOW_CHECKIN_MESSAGE_LOG
+
 // forward declarations
 class tst_logging;